My company,Maoyuan Biochem,is introduced as the largest manufacturer of anti-cancer APIs (camptothecin &derivatives) in China and our supplying covers 80% of Chinese market. Camptothecin 98% 99% 10-hydroxy camptothecin 99% 7-ethyl-10-hydroxycamptothecin 99% 7-ethylcamptothecin Paclitaxel 99% Bulk quantity per month can be provided: 200KG/month camptothecin 50kg/month 10-hydroxycamptothecin 10KG/month 7-ethyl-10-hydroxycamptothecin 1) Single impurity can be <0.1% 0.5% or per request. 2)Free sample can be provided for pre-ship evaluation. We expect to work with friends like you for mutual benefit and development. If you have any further question ,please kindly send email to me. Look forward to hearing from you soon, Best regards, Zoe Zuo 86-18228065025 86-028-87676351 Show More