t-butyl α-[6-(1-ethoxycarbonyl-3-phenylpropylamino)-5-oxo-2-(2-thienyl)perhydro-1,4-thiazepin-4-yl]acetate 、
三氟乙酸 以to afford the desired product as a crystalline powder in a yield of 83 mg的产率得到α-[6-(1-ethoxycarbonyl-3-phenylpropylamino)-5-oxo-2-(2-thienyl)perhydro-1,4-thiazepin-4-yl]acetic acid