6'-hydroxy-5'-methoxy-1'-methyl-2',3',8',8a'-tetrahydro-1'H,4H-spiro[cyclohexa-2,5-diene-1,7'-cyclopenta[ij]isoquinolin]-4-one InChI=1/C18H19NO3/c1-19-8-5-11-9-14(22-2)17(21)16-15(11)13(19)10-18(16)6-3-12(20)4-7-18/h3-4,6-7,9,13,21H,5,8,10H2,1-2H spiro[cyclohexa-2,5-diene-1,7'(1'H)-cyclopent[ij]isoquinolin]-4-one, 2',3',8',8'a-tetrahydro-6'-hydroxy-5'-methoxy-1'-methyl-