PROLI NONOate is a NO donor. It spontaneously dissociates in a pH-dependent, first-order process with a half-life of 1.8 seconds at 37°C (pH 7.4) to liberate 2 moles of NO per mole of parent compound.
Reference:
[1]. Baer, A.N., Costello, P.B., and Green, F.A. Free and esterified 13(R,S)-hydroxyoctadecadienoic acids: Principal oxygenase products in psoriatic skin scales. J. Lipid Res. 31(1), 125-130 (1990).