1-methoxy-4-({4-[(4-nitrophenyl)ethynyl]phenyl}ethynyl)benzene 1-methoxy-4-({4-[4-nitrophenyl)ethynyl]phenyl}ethynyl)benzene InChI=1/C23H15NO3/c1-27-23-16-12-21(13-17-23)9-7-19-4-2-18(3-5-19)6-8-20-10-14-22(15-11-20)24(25)26/h2-5,10-17H,1H benzene, 1-[(4-methoxyphenyl)ethynyl]-4-[(4-nitrophenyl)ethynyl]-