51773-74-1 (1S,3Z,5Z,7S,9Z,11E,13S,15R)-13-hydroxy-2-{[(2R)-2-hydroxypropanoyl]amino}-1,4,10,19-tetramethyl-17,18-dioxo-16-oxabicyclo[13.2.2]nonadeca-3,5,9,11-tetraen-7-yl acetate 51733-45-0 (1S,2R,3Z,5E,7S,9Z,11Z,13S,15R,19R)-7-hydroxy-1,4,10,19-tetramethyl-17,18-dioxo-2-[(2-oxopropanoyl)amino]-16-oxabicyclo[13.2.2]nonadeca-3,5,9,11-tetraen-13-yl pentanoate 128517-07-7 (1S,4Z,7S,10S,11E,20R)-4-ethylidene-7,20-dipropan-2-yl-9-oxa-15,16-dit hia-3,6,18,21-tetrazabicyclo[8.7.6]tricos-11-ene-2,5,8,19,22-pentone