Exact Mass: 597.3526
Exact Mass Matches: 597.3526
Found 39 metabolites which its exact mass value is equals to given mass value 597.3526
,
within given mass tolerance error 4.0E-5 dalton. Try search metabolite list with more accurate mass tolerance error
8.0E-6 dalton.
N-[[(3R,9R,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9R,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3S,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3S,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3S,9S,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3S,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3S,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3R,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3R,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3S,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3S,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3S,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3R,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3S,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3S,9S,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3S,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3S,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3S,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9R,10R)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3S,9R,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3S,9R,10S)-12-[(2S)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9S,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[(3R,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[(3R,9R,10S)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-9-[[methyl-[oxo-(propan-2-ylamino)methyl]amino]methyl]-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-16-yl]-4-pyridinecarboxamide
N-[[(3R,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
N-[[(3R,9R,10R)-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-16-[[oxo-(propan-2-ylamino)methyl]amino]-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methyl-4-pyridinecarboxamide
(2r)-2-(dimethylamino)-n-[(2s)-1-[(3s,7s,13s,16z)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-3-methyl-1-oxobutan-2-yl]-3-methylpentanimidic acid
(2r)-2-(dimethylamino)-n-[(2s)-1-[(3s,7s,13s,16z)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-3-methyl-1-oxobutan-2-yl]-3-methylpentanimidic acid
(2s,3s)-n-[(2s,3s)-1-[(3s,7s,13s,16z)-14,22-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.2.2.0³,⁷.0⁹,¹³]docosa-1(20),14,16,18,21-pentaen-6-yl]-3-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid
(2s,3s)-n-[(2s,3s)-1-[(3s,7s,13s,16z)-14,22-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.2.2.0³,⁷.0⁹,¹³]docosa-1(20),14,16,18,21-pentaen-6-yl]-3-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid
(2s,3s)-2-(dimethylamino)-n-[(2s)-1-[(3s,7s,13s,16e)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-3-methyl-1-oxobutan-2-yl]-3-methylpentanimidic acid
(2s,3s)-2-(dimethylamino)-n-[(2s)-1-[(3s,7s,13s,16e)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-3-methyl-1-oxobutan-2-yl]-3-methylpentanimidic acid
(2r)-n-[(2s)-1-[(3s,7s,13s,16z)-14,19-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid
(2r)-n-[(2s)-1-[(3s,7s,13s,16z)-14,19-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid
(2r)-n-[(2s)-1-[(3s,7s,13s,16z)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-3-methyl-2-(methylamino)pentanimidic acid
(2r)-n-[(2s)-1-[(3s,7s,13s,16z)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-3-methyl-2-(methylamino)pentanimidic acid
(2s,3s)-n-[(2s)-1-[(3s,7s,13s,16e)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-3-methyl-2-(methylamino)pentanimidic acid
(2s,3s)-n-[(2s)-1-[(3s,7s,13s,16e)-14-hydroxy-19-methoxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-3-methyl-2-(methylamino)pentanimidic acid
(2s,3s)-n-[(2s)-1-[(3s,7s,13s,16e)-14,19-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid
(2s,3s)-n-[(2s)-1-[(3s,7s,13s,16e)-14,19-dihydroxy-8-oxo-2-oxa-6,9,15-triazatetracyclo[16.3.1.0³,⁷.0⁹,¹³]docosa-1(21),14,16,18(22),19-pentaen-6-yl]-4-methyl-1-oxopentan-2-yl]-2-(dimethylamino)-3-methylpentanimidic acid