5',6'-dimethoxy-1'-methyl-2',3',8',8a'-tetrahydro-1'H,4H-spiro[cyclohex-2-ene-1,7'-cyclopenta[ij]isoquinolin]-4-one InChI=1/C19H23NO3/c1-20-9-6-12-10-15(22-2)18(23-3)17-16(12)14(20)11-19(17)7-4-13(21)5-8-19/h4,7,10,14H,5-6,8-9,11H2,1-3H spiro[cyclohex-2-ene-1,7'(1'H)-cyclopent[ij]isoquinolin]-4-one, 2',3',8',8'a-tetrahydro-5',6'-dimethoxy-1'-methyl-