培美曲塞杂质50 货号:P010050 英文名:Pemetrexed Impurity 50 同义词:Pemetrexed Acid Methyl Ester;methyl 4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoate CAS号:155405-80-4 分子式:C16H16N4O3 分子量:312.32 黄金现货 询价订购