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CAS号: 1357931-55-5 英文名称: Sildenafil EP IMpurity D 英文同义词: Sildenafil D;Sildenafil impurity D;Sildenafil EP IMpurity D;Methisosildenafil Impurity 19;Sildenafil Impurity 4(Sildenafil EP Impurity D);4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[;4-ethoxy-3-(1-methyl-7-oxo-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid;3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid;Benzenesulfonic acid, 3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy-;Sildenafil Impurity 4/Sildenafil EP Impurity D/ Demethylpiperazinyl Sildenafil Sulfonic Acid/4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid 中文名称: 西地那非杂质D 中文同义词: 西地那非杂质D;西地那非EP杂质D;枸橼酸西地那非杂质D;西地那非EP杂质D24;西地那非杂质D (EP);枸橼酸西地那非SD-C对 照品;枸橼酸西地那非杂质D(EP) 标准品;3-(6,7-二氢-1-甲基-7-氧代-3-丙基-1H-吡唑并[4,3-D]嘧啶-5-基)-4-乙氧基苯磺酸 分子式: C17H20N4O5S 分子量: 392.43 密度 : 1.48±0.1 g/cm3(Predicted) 酸度系数(pKa): -0.81±0.50(Predicted)