Profile: Luotian Hengxingyuan Chemical Co.,Ltd. specializes in R & D and sales of fine chemicals intermediates, raw materials for pharmaceuticals & health products & food additives. We offer melatonin, benserazidehydrochloride, 4-hydroxycoumarin, evodiamine, metronidazole benzoate, warfarin sodium clathrate, tryptamine, 5-chloro tryptamine and 5-methoxytryptamine. Our 4-hydroxycoumarin is used in the production of anticoagulants and it is also the antagonist of vitamin K.