上游原料
L-proline(3aS,11aR)-6,10-dimethyl-3-methylene-3a,4,5,8,9,11a-hexahydrocyclodeca[b]furan-2(3H)-one(3aS,5aR,6R,9aS,9bR)-6-hydroxy-5a,9-dimethyl-3-methylene-3a,4,5,5a,6,7,9a,9b-octahydronaphtho[1,2-b]furan-2(3H)-one(3aS,5aR,6R,9aS,9bR)-6-hydroxy-5a-methyl-3,9-dimethylenedecahydronaphtho[1,2-b]furan-2(3H)-one
