Chemical Formula: C55H70N4O6

methyl (11R,12R,21S,22S)-11-ethyl-16-(1-hydroxyethylidene)-12,17,21,26-tetramethyl-4-oxo-22-[3-oxo-3-[(2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraenoxy]propyl]-7,23,24,25-tetrazahexacyclo[18.2.1.15,8.110,13.115,18.02,6]hexacosa-1(23),2,5,8(26),9,13(25),14,17,19-nonaene-3-carboxylate

methyl (16Z,21S,22S)-11-ethyl-16-(1-hydroxyethylidene)-12,17,21,26-tetramethyl-4-oxo-22-[3-oxo-3-[(2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraenoxy]propyl]-7,23,24,25-tetrazahexacyclo[18.2.1.15,8.110,13.115,18.02,6]hexacosa-1(23),2,5,8(26),9,13(25),14,17,19-nonaene-3-carboxylate

methyl (11E,12R,21S,22S)-11-ethylidene-16-(1-hydroxyethylidene)-12,17,21,26-tetramethyl-4-oxo-22-[3-oxo-3-[(2E,7S,10E)-3,7,11,15-tetramethylhexadeca-2,10,14-trienoxy]propyl]-7,23,24,25-tetrazahexacyclo[18.2.1.15,8.110,13.115,18.02,6]hexacosa-1(23),2,5,8(26),9,13(25),14,17,19-nonaene-3-carboxylate

methyl (3R,21S,22S)-11,16-bis(ethenyl)-12-(hydroxymethylidene)-17,21,26-trimethyl-4-oxo-22-[3-oxo-3-[(E,7R,11R)-3,7,11,15-tetramethylhexadec-2-enoxy]propyl]-7,23,24,25-tetrazahexacyclo[18.2.1.15,8.110,13.115,18.02,6]hexacosa-1,5(26),6,8,10,13(25),14,16,18(24),19-decaene-3-carboxylate