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Whether cells can divide depends on the two key points of entering S phase and M phase. Studies have found that 10-Nitrocamptothecin can induce apoptosis. After administration, both S phase and G2M phase of cell growth are delayed. Inhibition occurred throughout the cell cycle and was found to be dose- and time-dependent.

ChEBI:Rubitecan is a pyranoindolizinoquinoline that is camptothecin in which the hydrogen at position 9 has been replaced by a nitro group. It is a prodrug for 9-aminocamptothecin. It has a role as an antineoplastic agent, an EC 5.99.1.2 (DNA topoisomerase) inhibitor and a prodrug. It is a pyranoindolizinoquinoline, a C-nitro compound, a semisynthetic derivative, a tertiary alcohol and a delta-lactone.