https://phytochem.nal.usda.gov/chemical-5-phenyl-13-pentadiyne
Chemical 5-PHENYL-1,3-PENTADIYNE | Dr. Duke's Phytochemical and Ethnobotanical Databases
https://physics.nist.gov/cgi-bin/MolSpec/mole.pl?prefix=hydro&molecule=C5H4&cas=24442-69-1&type=fancy&clear=1
Spectral Data for 1,4-Pentadiyne
spectraldata