1,4-diphenylbut-2-yne-1,4-dione 1087-09-8 2-butyne-1,4-dione, 1,4-diphenyl- InChI=1/C16H10O2/c17-15(13-7-3-1-4-8-13)11-12-16(18)14-9-5-2-6-10-14/h1-10