Xanthine in ChEBI
= Xanthine in ChEBI
{c}
https://www.ebi.ac.uk/chebi/CHEBI:15318
Provider-curated general xanthine record: purine nucleobase, formula C5H4N4O2, neutral charge. https://www.ebi.ac.uk/chebi/CHEBI:17712 is specifically9H-xanthine, with oxo groups at2 and6 and N9 protonation; not the general tautomer-unspecified record.