75975-32-5 Pentanoic acid, 2-hydroxy-3-methyl-, (1S,3S,3aR,4R,5R,6R,7aS)-5-(formyloxy)-3-(3-furanyl)octahydro-7a-hydroxy-3a-methyl-7-methylene-1-(((2E)-2-methyl-1-oxo-2-butenyl)oxy)-6-((5R,5aR,9aS)-octahydro-5,9a-dimethyl-2,7-dioxo-2H-pyrano(3,4-b)oxepin-5-yl)-1H-inden-4-yl ester, (2R,3R)-