camptothecine camptothecin 10-hydroxy camptotheccnum 9-nitrocellulose camptotheccnum camptothecine camptothecin 10-hydroxy camptotheccnum 9-nitrocellulose camptotheccnum physical properties raw material nothapodytes foetida (wt) miers (icainaceae) preparation total extractives of powdered wood suing a solvent, further processing and purification. physical characteristics pale yellow coloured powder, mp 257-260 deg. c soluble in dmf (dimethyl formamide) chemical characteristics common names camptothecine chemical name (s) 4-ethyl-4-hydroxy-ih-pyrano indolizino (1,2,-b) quinoline 3,14 (4h, 12h)-dione molecular formula c20 h16 n2 04 molecular weight 346.34 identification ir (kbr) uv (max) specific optical rotation v max 3400 1745 1655 1605 & 1580 cm l max 220, 253 & 358 nm +31.3 deg. (in chloroform-methanol) purity usp std by hplc 98% +. toxicity highly toxic use anti cancer activity, raw material for topotecan, cpt-11 more about our products, please visit us in our website: http://www.organic-herb.com if there are any further questions, please do not hesitate to contact me. we welcome your precious suggestions and any of your question. thanks for your interests in organic herb inc. sincerely yours, ms mary liu sales manager organic herb inc. phone +86 731 4060828 mobile +86 131 8709 3042 fax +86 731 4023669 email: mary@organic-herb.com website: http://www.organic-herb.com add: no.1038.shanshuirenjia3rd.kaiyuanroad, xinsha, changsha, hunan, china 410100