. "The chemical reactions and pathways resulting in the breakdown of a purine-containing compound, i.e. any compound that contains purine or a formal derivative thereof." . . . . . . "purine-containing compound catabolic process" . "purine and derivative catabolic process" . "purine-containing compound breakdown" . "purine-containing compound catabolism" . "purine-containing compound degradation" . . . . .