2,5-Diphenyl-1,3-oxazole 2,5-Diphenyloxazole 4-27-00-01435 (Beilstein Handbook Reference) 92-71-7 BRN 0157021 DPO (scintillator) EINECS 202-181-3 NSC 24856 OXAZOLE, 2,5-DIPHENYL- PPO (VAN) PPO (scintillator) PPO (scintillator) (VAN) Tritosol USAF EK-6775