中韩高清无专码区2021曰_色翁荡熄又大又硬又粗又视频图片_波多野结衣乳巨码无在线观看_国产91福利在线播放_国产人妻人伦精品_马来西亚潜水天堂_黄色免费网站下载_免费看黄网站黄污污污热门软件_小莹客厅激情46章至50章视频

Huaian Yishu Technology Co., Ltd. is located in the hometown of the great leader Premier Zhou Enlai, adjacent to the Beijing-Shanghai, Ning-Lian, and Yan-Su-Xu expressways, as well as the Xinchang Railway. It is 24 kilometers from Huaian Airport, with the Beijing-Hangzhou Grand Canal running through the area, providing convenient water and land transportation. The company is dedicated to the research, development, and production of organic chemical products in collaboration with various research institutions and chemical production enterprises.

Currently, the developed and produced varieties are divided into four major categories. The first category is pharmaceutical intermediates in the bromine series: phosphorus tribromide, acetyl bromide, bromoacetyl bromide, propionyl bromide, 2-bromopropionyl bromide, bromohexane, bromooctane, bromoheptane, bromodecane, tribromomethane, 6-bromoveratraldehyde, trans-1,4-dibromo-2-butene, etc. Phosgene-based products: isopropyl chloroformate, n-heptanoyl chloride, lauroyl chloride, etc. Amino acids: L-hydroxyproline, L-arginine, L-proline, etc. Also included are intermediates for Veltapavir, Sofosbuvir, and Ledipasvir. The products are of high quality and competitively priced, with long-term cooperative relationships established with well-known domestic companies. The products are exported to markets in Japan, the United States, South Korea, and Europe, receiving high praise from users.