CAS No 90965-59-6 , 2-Butenoic acid,4-amino-4-oxo-,(2R,4R,5S,6R)-6-ethyltetrahydro-2-hydroxy-2-[(1S,2R,3S)-2-hydroxy-3-[(2R,3S,4E,6E,9S,10S,11R,12E,14E)-10-hydroxy-3-methoxy-7,9,11,13,15-pentamethyl-16-oxooxacyclohexadeca-4,6,12,14-tetraen-2-yl]-1-methylbutyl]-5-methyl-2H-pyran-4-ylester, (2E)- (9CI)