3'-({[(1,1-dimethylethyl)diphenylsilyl]oxy}methyl)-6',7',8',9'-tetrahydro-1',4,5,6,8,9,10'-heptamethoxy-3-(phenylmethylene)spiro[2H-benz[f]indene-2,9'-benz[g]isoquinolin]-1(3H)-one

6',7',8',9'-tetrahydro-1',4,5,6,8,9,10'-heptamethoxy-3'-pentylspiro(2H-benz[f]indene-2,9'-benz[g]isoquinoline)-1,3-dione

6',7',8',9'-tetrahydro-3'-(hydroxymethyl)-1',4,5,6,8,9,10'-heptamethoxyspiro(2H-benz[f]indene-2,9'-benz[g]isoquinoline)-1,3-dione

1,3,6',7',8',9'-hexahydro-1',4,5,6,8,9,10'-heptamethoxy-1,3-dioxospiro(2H-benz[f]indene-2,9'-benz[g]isoquinoline)-3'-carboxaldehyde

3'-({[(1,1-dimethylethyl)diphenylsilyl]oxy}methyl)-6',7',8',9'-tetrahydro-1',4,5,6,8,9,10'-heptamethoxy-spiro[2H-benz[f]indene-2,9'-benz[g]isoquinoline]-1,3-dione