The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.
An organic heterotetracyclic compound that is 1-methyl-8-azabicyclo[3.2.1]octane ortho-fused to two benzene rings at positions 2-3 and 6-7 (the 5S,10R-stereoisomer). It is a non-competitive antagonist of the N-methyl-D-aspartate (NMDA) receptor and affects cognitive function, learning, and memory.