A flavonoid compound found in the bark and rinds of many plants and fruits.

An isomer of hypoxanthine that inhibits xanthine oxidoreductase (IC50 values between 0.2 and 50 μM); lowers serum and urinary uric acid levels in vivo and is used to treat gout and hyperuricemia.

An alkyl sulfonate that acts as an alkylating antineoplastic agent; forms both intra- and interstrand crosslinks on DNA, in addition to monoalkylation, primarily at guanine-N7, of DNA.