3,4-dimethoxybenzoic acid

Riyuexin chemical industrial co.,ltd. is a prefessional manufacturer/exporter of pharmaceutical intermediates and apis. with edged technics and seasoned engineers,we research and develope many kinds unique intermediates and apis to meet worldwide customers, also we can research and produce as per customer's requests! our key products including many kinds intermediates and apis relatived to pharmaceuticals' application,such as 5-hydroxy-1-tetralone,iron sucrose etc.