... , for the production of antihypertensive drug methyldopa, catechol drug L-dopa, and Katalin, diaveridine etc.. 20kg, 50kg/fiber board drums; ... thirty years of hard work, it has developed rapidly and improved market competitiveness significantly. Focus on vanillin's production, ... the company has created a perfect industry chain,and the product line includes vanillin,ethyl vanillin,guaiacol,o ...