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Catalog No.
Topoisomerase 1 inhibitor
Grouped product items
SizePriceStock Qty
10mM (in 1mL DMSO)
In stock
In stock
In stock
Ship with 10-15 days

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Topotecan (SKF104864) is an inhibitor of topoisomerase 1 and semisynthetic analogue of camptothecin [1].

Topotecan (SKF104864) has been reported to have a potent antitumor activity against tumors in murine models. In addition, Topotecan has also shown the potent effect against intravenously implanted P388 leukemia and both intravenously and subcutaneously implanted Lewis lung carcinoma. Topotecan has noted the activity against subcutaneously implanted solid tumors including chemorefractory tumors and human colon carcinoma xenograft HT-29. Topotecan has been found to induce regressions in the lung tumor model (Lewis lung carcinoma and B16 melanoma), compared to camptothecin and 9-amino-camptothecin. In the preclinical toxicology studies, Topotecan has been revealed to have a concentration-dependent, reversible and limited toxoicity to rapidly proliferation tissues such as bone marrow and gastro-intestinal epithelium [1].

[1] Creemers GJ1, Lund B, Verweij J. Topoisomerase I inhibitors: topotecan and irenotecan. Cancer Treat Rev. 1994 Jan;20(1):73-96.

Product Citation

Chemical Properties

Physical AppearanceA solid
StorageStore at -20°C
Cas No.123948-87-8
Solubility≥21.1 mg/mL in DMSO
Chemical Name(S)-10-((dimethylamino)methyl)-4-ethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione
SDFDownload SDF
Canonical SMILESCC[[email protected]]1(O)C(C=C2C3=NC4=CC=C(O)C(CN(C)C)=C4C=C3CN2C5=O)=C5COC1=O
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.

Quality Control

Chemical structure


Related Biological Data


Related Biological Data