1,3-Dioxolane-2-acetic acid, 2,4-dimethyl-, ethyl ester 6290-17-1 Acetoacetic acid, ethyl ester, 1,2-propylene ketal EINECS 228-536-2 Ethyl 2,4-dimethyl-1,3-dioxolane-2-acetate Ethyl acetoacetate propylene glycol ketal NSC 6547