4-[2-amino-5-[4-amino-3-(4-sulfobutoxy)phenyl]phenoxy]butane-1-sulfonic acid

4-(1,1,2-trimethyl-2H-benzo[e]indol-3-yl)butane-1-sulfonic acid

磺酸己烷

4-(三苯磷基)丁烷-1-磺酸酯

4-(2-methylimidazol-1-yl)butane-1-sulfonic acid