IUPAC:6-formyl-4,6',7'-trihydroxy-2',5',5',8'a-tetramethyl-3',4',4'a,5',6',7',8',8'a-octahydro-2'H,3H-spiro[1-benzofuran-2,1'-naphthalene]-7-carboxylic acid
IUPAC:6-formyl-4,6',7'-trihydroxy-2',5',5',8'a-tetramethyl-3',4',4'a,5',6',7',8',8'a-octahydro-2'H,3H-spiro[1-benzofuran-2,1'-naphthalene]-7-carboxylic acid