2-(4-but-2-ynyloxy-benzenesulfonylamino)-3-methyl-butyric acid methyl ester 、
1-溴-3-氯丙烷 以provided 0.92 g of methyl2-[{[4-(2-butynyloxy)penyl]sulfonyl}(3-chloropropyl)amino]-3-methylbutanoate as a white solid的产率得到methyl 2-[{[4-(2-butynyloxy)-phenyl]-sulfonyl}(3-chloropropyl)amino]-3-methylbutanoate