乙基-1-氧代-3-硫杂-9-氮杂螺[5.5]十一烷-2-羧酸甲酯3,3-二氧化物盐酸盐

ethyl 1-oxo-3-thia-9-azaspiro[5.5]undecane-2-carboxylate 3,3-dioxide hydrochloride