Synonyms: 15,19-Epoxy-1H,3H-pyrrolo[2,1-c][1,4]oxaazacyclotricosine-1,7,20,21(4H)-tetrone,5,6,8,11,12,13,14,15,16,17,18,19,23,24,25,25a-hexadecahydro-5,19-dihydroxy-3-[(1E)-2-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]-1-methylethenyl]-14,16-dimethoxy-4,10,12,18-tetramethyl-8-(2-propenyl)-,(3S,4R,5S,8R,9E,12S,14S,15R,16S,18R,19R,25aS)- (9CI);15,19-Epoxy-1H,3H-pyrrolo[2,1-c][1,4]oxaazacyclotricosine-1,7,20,21(4H)-tetrone,5,6,8,11,12,13,14,15,16,17,18,19,23,24,25,25a-hexadecahydro-5,19-dihydroxy-3-[2-(4-hydroxy-3-methoxycyclohexyl)-1-methylethenyl]-14,16-dimethoxy-4,10,12,18-tetramethyl-8-(2-propenyl)-,[3S-[3R*[E(1S*,3S*,4S*)],4S*,5R*,8S*,9E,12R*,14R*,15S*,16R*,18S*,19S*,25aR*]]-;FK 525; FR 900525