以對氨基水楊酸為原料,經(jīng)酯化 、 ?；蜔N化反應(yīng)得乙氧苯酯,總收率為87.Ethopabate is prepared via esterification, acylation and alkylation from p - aminosalicylic acid in 87.在閥桿孔內(nèi)的后座上鍍鎳,可應(yīng)用在嚴(yán)酷的烴化環(huán)境.Nickel plated overlay on backseat in stem hole to combat...