7608-17-5
diphenyl(2-phenylethynyl)phosphane
+
68864-57-3
1,5-dibromo-2,4-pentadione
→
21680-89-7
2,4,4-triphenyl-6-[(4,4,6-triphenyl-1,4-oxaphosphinin-4-ium-2-yl)methyl]-1,4-oxaphosphinin-4-ium,bromide