Synonyms: AC1L3N9U;Cyclopenta-1,3-dienide,1,4-diphenyl-5-triphenylphosphinylium-2,3-(naphtha-1,8-diyl),inner salt;(7,9-diphenylcyclopenta[a]acenaphthylen-8-ylidene)-triphenyl-;57525-41-4;Cyclopenta-1,3-dienide, 1,4-diphenyl-5-triphenylphosphinylium-2,3-(naphtha-1,8-diyl), inner salt