chemical formula, structural formula and 3d ball-and-stick model of the anticancer drug topotecan, white background

acuminata and anticancer antineoplastic atom background ball biology brainstem camptotheca camptothecin chemical chemistry chemotherapy drug effects ewing formula glioma illustration inhibitor isolated medicine model molecule neuroblastoma nitrogen organic oxygen pharmaceutical prescription research sarcoma science side stick structural structure synthetic topoisomerase topotecan white