3，4-***二羧酸酐 Pyridine-3,4-dicarboxylic anhydride 46
3，4-***二羧酸酐Pyridine-3,4-dicarboxylicanhydride4664-08-8C7H3NO3149.123，4-***二羧酸Pyridine-3,4-dicarboxylicacid490-11-9C7H5NO4167.12)
主营：OrgSynChem (Beijing) Technology Co., LTD. 医药中间体，定制合成，Custom synthesis
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