spliceostatin A

(4S)-acetoxy-pent-2-ynoic acid

Acetic acid (Z)-(S)-3-{(2R,3R,5S,6S)-6-[(2E,4E)-5-((3R,4R,5R)-4-hydroxy-7-methylene-1,6-dioxa-spiro[2.5]oct-5-yl)-3-methyl-penta-2,4-dienyl]-2,5-dimethyl-tetrahydro-pyran-3-ylcarbamoyl}-1-methyl-allyl ester

(-)-(S)-4-hydroxypent-2-ynoic acid

(3R,4R,5R,7S)-7-methyl-5-vinyl-1,6-dioxaspiro[2.5]octane-4,7-diol