2,3,7,7a-Tetraphenyl-5-benzylidentriphenylphosphonium-6-olat-1H,5H,7aH-pyrrolizin-1-on

2-ethoxy-1-methyl-2,4,5-triphenylpyrrol-3-one

3,4-diphenylindeno[1,2-b]pyran-2,5-dione

1-methyl-3,4-diphenylindeno[1,2-b]pyridine-2,5-dione

1,7,7-trimethyl-2,3-diphenyl-6,8-dihydroquinoline-4,5-dione