Shanxi Yongjin Group is a professional manufacturer that is engaged in the research, development, production and sales of pharmaceutical raw materials and chemical intermediates. We have several kinds of tonnage products in stock, such as 3,4- dihydroxybenzaldehyde, 2,4-dihydroxybenzaldehyde, 3,4-dibenzyloxybenzaldehyde, p-dimethyl ether, caffeic acid, 2,3- dichloroquinoxaline, p-hydroxybenzaldehy...