Showing structure for (2r,2's,4'ar,4'bs,7's,8'ar,10'ar)-2',4,5,7'-tetrahydroxy-4'b,8',8',10'a-tetramethyl-2',3',4',4'a,5',6',7',8'a,9',10'-decahydro-3h-spiro[1-benzofuran-2,1'-phenanthrene]-7-carbaldehyde