4-OXAZOLECARBOXYLIC ACID, 2-[[(1,1-DIMETHYLETHOXY)CARBONYL]AMINO]-, ETHYL ESTER/ 95% CAS:244236-51-9 4-OXO-2-PHENYL-4,5-DIHYDROPYRAZOLO[1,5-A]PYRAZINE-3-CARBALDEHYDE/ >90% MFCD27974709 CAS:1610377-19-9 |