3,3-diphenyl-1-oxa-spiro[3.5]nona-5,8-diene-2,7-dione

4-(二苯基亚甲基)-2,5-环己二烯-1-酮

4-溴苯酚

二苯基甲烷

N-(p-methylphenyl)sulfonyl diphenylmethylamine