雷帕霉素

(S,E)-5-((2S,5R,6S)-6-((tert-butyldimethylsilyl)oxy)-5-methyltetrahydro-2H-pyran-2-yl)-4-methoxy-3-methylpent-2-enal

(S,E)-4-methoxy-3-methyl-5-((2S,5R)-5-methyl-6-oxotetrahydro-2H-pyran-2-yl)pent-2-enal