benzhydryl prop-2-ynoate

5,5-diphenyl-4-(phenylsulfonyl)dihydrofuran-2(3H)-one

hydroxy-2 diphenyl-5,5 dihydro-2,5 furanne

diphenyl-5,5 dioxa-4,10 exo-tricyclo<5.2.1.02.6>decene-8 one-3

4,4-二苯基-3-丁烯酸