1·The substance was synthesized from P-hydroxybenzoic acid through three steps.
该物质以对羟基苯甲酸为原料，经三步合成。
2·Nipagin esters were synthesized by the esterification of dodecyl and octadecyl alcohol with p -hydroxybenzoic acid in the presence of vitamin C.
以维生素C为催化剂， 对羟基苯甲酸和十六醇及十八醇为原料合成尼泊金十六酯与尼泊金十八酯。
3·Methods The substance was synthesized from P-hydroxybenzoic acid through three steps, those are etherification, preparation of acyl halide and amidation of the raw material.
方法以对羟基苯甲酸为原料，经三步合成，即原料的醚化、酰氯制备和酰胺化。
4·INGREDIENTS: Deionized water, hydrogenated poly-decene, methyl p-hydroxybenzoate p-hydroxybenzoic acid propyl, acrylic acid copolymer, mineral oil, daily flavor.
主要成份：去离子水、氢化聚癸烯、对羟基苯甲酸甲酯、对羟基苯甲酸丙酯、丙烯酸共聚物、矿物油、香料。
5·Structural analogs, such as phenol, p-hydroxybenzoic acid and p-aminobenzoic acid, only small responses electrode were observed. Moreover, structural unanalog vitamin C had almost no response.
对结构相似的苯酚、对羟基苯甲酸、对氨基苯甲酸等响应不灵敏，对结构差异较大的如维生素C等几乎无响应。