1-[3-(4-Chloro-phenyl)-7-methyl-7aH-[1,2,3]diazaphospholo[3,4-d][1,2,4]oxaphosphol-5-yl]-ethanone
1-(3,4,4-Trimethyl-6-phenyl-3a,4-dihydro-1,2,5-triaza-6a-phospha-pentalen-1-yl)-ethanone
1-[3-(4-Chloro-phenyl)-7-methyl-4-oxo-4,7a-dihydro-4λ5-[1,2,3]diazaphospholo[3,4-d][1,2,4]oxaphosphol-5-yl]-ethanone
1-(7-Methyl-3,3-diphenyl-3H-4λ5-[1,2,4]diazaphospholo[4,3-c][1,2,3]diazaphosphol-5-yl)-ethanone
2-acetyl-3-chloro-6-methyl-4,4-diphenyl-2,3,4,5-tetrahydro-[1,2,3]diazaphosphinine