3-[4-(Dipropylamino)phenyl]-4′,4′,6,6-tetramethyl-3,5,6,7-tetrahydro-2′H,4H,6′H-spiro[1-benzofuran-2,1′-cyclohexane]-2′,4,6′-trione

3-[4-(Dipropylamino)phenyl]-4′,4′,6,6-tetramethyl-3,5,6,7-tetrahydro-2′H,4H,6′H-spiro[1-benzofuran-2,1′-cyclohexane]-2′,4,6′-trion

3-[4-(Dipropylamino)phenyl]-4′,4′,6,6-tetramethyl-3,5,6,7-tetrahydro-2′H,4H,6′H-spiro[1-benzofuran-2,1′-cyclohexane]-2′,4,6′-trione

3-[4-(Dipropylamino)phényl]-4′,4′,6,6-tétraméthyl-3,5,6,7-tétrahydro-2′H,4H,6′H-spiro[1-benzofuran-2,1′-cyclohexane]-2′,4,6′-trione

Spiro[benzofuran-2(4H),1′-cyclohexane]-2′,4,6′-trione, 3-[4-(dipropylamino)phenyl]-3,5,6,7-tetrahydro-4′,4′,6,6-tetramethyl-

3-[4-(dipropylamino)phenyl]-6,6,14,14-tetramethylspiro[2,3,5,6,7-pentahydrobenzo[1,2-b]furan-2,2′-cyclohexane]-4,10,12-trione