发明授权
US4438133A Therapeutically effective derivatives of cystine 失效
治疗有效的胱氨酸衍生物

Therapeutically effective derivatives of cystine
摘要:
Novel cystine derivatives having the structural formula (I): ##STR1## wherein R is benzyloxycarbonyl or tosyl, and the pharmaceutically acceptable acid addition salts thereof, are effective expectorants and antitussives, and are also effective for the liquescence of respiratory tract fluids.
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