15589-82-9 Hexahydro-1,5,6a-trihydroxy-5,9-dimethylspiro(6H-4,9a-methanocyclopent(d)oxocin-6,3'-oxetane)-2,2'(1H)-dione (1R-(1alpha,4beta,5beta,6beta,6aalpha,9alpha,9abeta))- Neoanisatin Spiro(6H-4,9a-methanocyclopent(d)oxocin-6,3'-oxetane)-2,2'(1H)-dione, hexahydro-1,5,6a-trihydroxy-5,9-dimethyl-, (1S-(1-alpha,4-beta,5-beta,6-beta,6a-alpha,9-alpha,9a-beta))-