CYPMPO (934182-09-9) is a free radical spin-trap with hydroxyl and superoxide free radical trapping capabilities similar to DEPMPO (Cat.# 10-4502). Better solubility and increased half-life in aqueous buffers can give CYPMPO a practical advantage over DEPMPO in some experiments.
1) Kamibayashi et al. (2006) Synthesis and characterization of a practically better DEPMPO-type spin trap, 5-(2,2-dimethyl-1,3-propoxycyclophosphoryl)-5-methyl-1-pyrroline N-oxide (CYPMPO); Free Radic. Res. 40 1166