Piperafizine A is a methylated diketopiperazine formed by the condensation of phenylalanine and produced by a number of species in the Streptomyces genus. Piperafizine A exhibits little activity in vitro but has been seen to potentiate vincristine antitumor potency. The mechanism of action has not been characterized.
Soluble in ethanol, methanol, DMF or DMSO. Limited water solubility