0 2 COA Offer Ethyl 3Oxo4Phenylbutanoate CAS 5413058 100% Customs Clearance Factory Supply Bmk CAS 5413-05-8 2-Phenylacetoaceticacidethylester;ETHYL3-OXO-2-PHENYLBUTANOATE;ETHYL2-PHENYLACETOACETATE;(2R)-...