Cephalomannine CAS NO.71610-00-9

Hubei CuiRan Biotechnology Co., Ltd is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine，Traditional Chinese Medicine), Natural Active Pharmaceutical Ingredients worldwide. From small quantities for R&D or reference standard, to large quantities for customizing or manufacturing, Biopurify emphasizes on consistent and reliable services for his customers. 
With excellent quality products and good service, we have clients from more than dozens countries and regions, and we pride ourselves in providing our customers with a total satisfaction experiences.
We are doing our best to be your reliable partner for high quality Phytochemicals and Reference Standards from china.
 
Our main services:
A. Supply active ingredients and reference standards ofTraditional Chinese Medicine, from mgs to kgs scale.
B. Custom extraction and purification, target Herb Active Ingredients
C. Custom synthesis and semi-synthesis for Natural Active Ingredients
D. CR, CM and PD services from lab scale, pilot scale to commercial scale(GMP is also available)
E.Traditional Chinese Medicine compounds library
 

1.Provide traditional Chinese medicine reference materials and natural active ingredients;
2.More than 2200 compounds are available for selection, continuously building high-quality natural product libraries for drug research and development;
3.Provide various screening libraries and more inhibitor products;
4.Provide separation and structural determination of natural products;
5.Laboratory scale pilot to commercial scale collaborative research and process development services.More than 180 experiences in phytochemistry (still increasing)
Each product has passed very strict testing (NMR/MS/HPLC)
Agents from many countries

General tips：For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging：1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition：Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Chemical Properties of Cephalomannine

Source of Cephalomannine

The barks of Cephalotaxus sinensis (Rehd. et Wils.) Li

Biological Activity of Cephalomannine

Protocol of Cephalomannine

Preparing Stock Solutions of Cephalomannine

References on Cephalomannine

Cephalomannine and 10-deacetyltaxol cytotoxicity in human glial and neuroblastoma cell-lines.[Pubmed:21573554]

Int J Oncol. 1993 Feb;2(2):297-9.

The cytotoxic effects of taxol, 10-deacetyltaxol, and Cephalomannine at concentrations of 0.1 mug/ml to 10.0 mug/ml for one and 24 hours exposure were determined in two human glioblastoma multiforme and two neuroblastoma cell lines using the MTT method. The neuroblastoma cell lines were established from previously treated patients, while the glioblastomas were from untreated patients. There was a proportionate concentration-toxicity relationship for all four cell lines. The neuroblastoma SK-N-FI was consistently the most resistant to all three drugs. The order of potency after a one hour exposure was taxol, 10-deacetyltaxol and Cephalomannine. Cephalomannine contained 1.5% taxol impurity and 10-deacetyltaxol, 4.5% taxol hence the contribution of taxol to these substances' toxic effects was minimal. We conclude that tumors of the central and peripheral nervous system are sensitive to 10-deacetyltaxol and Cephalomannine and these drugs are less toxic than taxol but remain within a therapeutic range.

Synthesis, isolation, stereostructure and cytotoxicity of paclitaxel analogs from cephalomannine.[Pubmed:23876369]

Fitoterapia. 2013 Oct;90:79-84.

Four paclitaxel derivatives were afforded by preparative HPLC separation of two pairs of diastereoisomers, which were obtained by catalytic hydrogenation and epoxidation of the C-13 side-chain double bond of Cephalomannine, a naturally occurring paclitaxel analog. The four paclitaxel derivatives were analyzed using NMR, CD spectroscopy, and side-chain hydrolysis in order to measure their optical rotations and GC characteristics. In this way, the stereoconfigurations of the products were determined. Evaluation of the compounds' activity indicated that they had differing cytotoxic activities: compound 5 had superior activity in BCG-823 tumor cells compared to paclitaxel, while compound 7 had superior activity in HCT-8 and A549 tumor cells compared to paclitaxel. These results indicate that the stereoconfiguration of the paclitaxel N-acyl side chain has a significant impact on its activity.

Taxane's substituents at C3' affect its regioselective metabolism: different in vitro metabolism of cephalomannine and paclitaxel.[Pubmed:18039807]

Drug Metab Dispos. 2008 Feb;36(2):418-26.

To investigate how taxane's substituents at C3' affect its metabolism, we compared the metabolism of Cephalomannine and paclitaxel, a pair of analogs that differ slightly at the C3' position. After Cephalomannine was incubated with human liver microsomes in an NADPH-generating system, two monohydroxylated metabolites (M1 and M2) were detected by liquid chromatography/tandem mass spectrometry. C4'' (M1) and C6alpha (M2) were proposed as the possible hydroxylation sites, and the structure of M1 was confirmed by (1)H NMR. Chemical inhibition studies and assays with recombinant human cytochromes P450 (P450s) indicated that 4''-hydroxyCephalomannine was generated predominantly by CYP3A4 and 6alpha-hydroxyCephalomannine by CYP2C8. The overall biotransformation rate between paclitaxel and Cephalomannine differed slightly (184 vs. 145 pmol/min/mg), but the average ratio of metabolites hydroxylated at the C13 side chain to C6alpha for paclitaxel and Cephalomannine varied significantly (15:85 vs. 64:36) in five human liver samples. Compared with paclitaxel, the major hydroxylation site transferred from C6alpha to C4'', and the main metabolizing P450 changed from CYP2C8 to CYP3A4 for Cephalomannine. In the incubation system with rat or minipig liver microsomes, only 4''-hydroxyCephalomannine was detected, and its formation was inhibited by CYP3A inhibitors. Molecular docking by AutoDock suggested that Cephalomannine adopted an orientation in favor of 4''-hydroxylation, whereas paclitaxel adopted an orientation favoring 3'-p-hydroxylation. Kinetic studies showed that CYP3A4 catalyzed Cephalomannine more efficiently than paclitaxel due to an increased V(m). Our results demonstrate that relatively minor modification of taxane at C3' has major consequence on the metabolism.

Description

Cephalomannine is an active anti-cancer agent obtained from Taxus yunnanensis and has an antineoplastic effect on tumors found in mice.

Keywords:

Cephalomannine,71610-00-9,Natural Products, buy Cephalomannine , Cephalomannine supplier , purchase Cephalomannine , Cephalomannine cost , Cephalomannine manufacturer , order Cephalomannine , high purity Cephalomannine