Sulfanilamide is an analog of p-aminobenzoic acid,which is a part of the vitamin folic acid.Sulfanilamide acts by blocking the synthesis of folic acid,a nucleic acid precursor..磺胺是对氨基苯甲酸的类似物，可阻断叶酸的合成. H2N SO2NH2 H2N COOH (a)Sulfanilamide (b)p-Aminobenzoic acid cHs片 COOH HN-C-H CH2 CH2 COOH (c)Folic acid 2012 Pearson Education,IngSulfanilamide is an analog of p-aminobenzoic acid, which is a part of the vitamin folic acid. Sulfanilamide acts by blocking the synthesis of folic acid, a nucleic acid precursor.磺胺是对氨基苯甲酸的类似物, 可阻断叶酸的合成