70237-69-3 Pentanoic acid, 2-hydroxy-3-methyl-, (1S,3S,3aR,4R,5R,6R,7aS)-1-(acetyloxy)-5-(formyloxy)-3-(3-furanyl)-6-((5R,5aR,9aR)-5,5a,6,7,9,9a-hexahydro-5,9a-dimethyl-2,7-dioxo-2H-pyrano(3,4-b)oxepin-5-yl)octahydro-7a-hydroxy-3a-methyl-7-methylene-1H-inden-4-yl ester, (2R,3R)-