Xi'an Guanyu Bio-tech Co., Ltd is located in Xi'an city, Shaanxi province, China, which specializes in research, development, production and trade of API (active pharmaceutical ingredient). We mainly undertake researching, developing and producing in fields of Anti-cancer pharmaceutical raw materials, intermediates and herb extracts such as Irinotecan, Paclitaxel, Docetaxel, Resveratrol, Homoharringtonine, Etoposide, Topotecan, Camptothecin, 7-ethyl-10-Hydroxycamptothecin, and Vinorelbine. Our products have been exported to USA, Europe, Asia, Africa, South America, Australia and so on. We also supply contract or customer-made research development on natural products either as raw material or for end use. Our powerful R& D team will satisfy you with low cost and good efficiency. Sincerely hope to build long-term friendly business relationships with your esteemed company.