(2S,3S,4E,6S,7R,10R)-7,10-Dihydroxy-3,7-dimethyl-12-oxo-2-[(2E,4E,6R)-6-(2-pyridinyl)-2,4-heptadien-2-yl]oxacyclododec-4-en-6-yl 4-methyl-1-piperazinecarboxylate
(2s,3s,4e,6s,7r,10r)-7,10-dihydroxy-3,7-dimethyl-12-oxo-2-[(2e,4e,6r)-6-(2-pyridinyl)-2,4-heptadien-2-yl]oxacyclododec-4-en-6-yl 4-methyl-1-piperazinecarboxylate