Qingzhou Aoxing Chemical Co., Ltd.--Ethyl 2-chloroacetoacetate,Trifluoromethanesulfonic acid,3,4-Pyridinedicarboxylic acid,1-Bromo-5-chloropentane,2-Chloro-3-pyridinol,alpha-acetylphenylacetonitrile,2-(2-Bromoethyl)-1,3-dioxolane