(R,S)-4-((4'-hydroxy-3-((4-hydroxyphenyl)ethynyl)biphenyl-2-yl)(4-hydroxyphenyl)methylene)-2,5-cyclohexadien-1-one
(r,s)-4-((4'-hydroxy-3-((4-hydroxyphenyl)ethynyl)biphenyl-2-yl)(4-hydroxyphenyl)methylene)-2,5-cyclohexadien-1-one