Biological Magnetic Resonance Data Bank

A Repository for Data from NMR Spectroscopy on Proteins, Peptides, Nucleic Acids, and other Biomolecules
Member of WWPDB


Camptothecin synonyms


Graphical representations:


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Molecular Formula: C20H16N2O4

Natural Isotopic Abundance Mass: 348.35204

Mono-Isotopic Molecular Masses:

  • C12N14: 348.111007002
  • C13N14: 368.178103762
  • C12N15: 350.105076788
  • C13N15: 370.172173548

InChI string: InChI=1S/C20H16N2O4/c1-2-20(25)14-8-16-17-12(7-11-5-3-4-6-15(11)21-17)9-22(16)18(23)13(14)10-26-19(20)24/h3-8,25H,2,9-10H2,1H3/t20-/m0/s1

BMRB Ligand Expo: EHD
PubChem Compound (CID): 24360

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.

InChI string and atom numbering calculated using ALATIS (Hesam Dashti, William M. Westler, John L. Markley, Hamid R. Eghbalnia, "Unique identifiers for small molecules enable rigorous labeling of their atoms", Scientific Data 4, Article number: 170073 (2017), doi:10.1038/sdata.2017.73,