7608-17-5
diphenyl(2-phenylethynyl)phosphane
+
6305-43-7
1,4-二溴-2,3-丁二酮
→
21680-88-6
2,4,4-triphenyl-6-(4,4,6-triphenyl-1,4-oxaphosphinin-4-ium-2-yl)-1,4-oxaphosphinin-4-ium,bromide