Showing structure for methyl (2r,3r,3'r,3''s,3as,3'as,6'r,7'r,7as,7'ar)-6'-(furan-3-carbonyl)-3-hydroxy-3',4,4,6',7'a-pentamethyl-6-oxo-octahydrodispiro[furo[3,2-c]pyran-2,1'-[2]benzofuran-7',2''-oxirane]-3''-carboxylate