Butanoic acid, 3-methyl-, 4-((acetyloxy)methyl)-4a,5,6,7a-tetrahydrospiro(cyclopenta(c)pyran-7(1H),2'-oxirane)-1,6-diyl ester, (1S-(1-alpha,6-alpha,7-beta,7a-alpha))- Dihydrovaltrate EK7902500