Apiin is a naturally occurring flavonoid isolated from celery, it shows antiinflammatory activity mediated through inhibition of NO (nitric oxide synthesis) and inhibition of iNOS expression.

Dimethoxycurcumin is a synthetic and metabolically more stable urcumin analogue with anti-inflammatory and antioxidant activities, inducing epigenetic changes in leukemia cells and the expression of promoter methylated genes.

Biopterin is a novel and potent pterin coenzyme.

NQN-1 (PPM-18), a chemically synthesized naphthoquinone derivative and an anti-inflammatory agent, is a novel, potent and cell-permeable and anti-inflammatory agent shown to express inhibitory effects of iNOS through the blocking of NF kappa B activation in vitro.

1400W (1400-W) is a slow, tight binding, potent, and highly selective inhibitor of inducible nitric-oxide synthase (iNOS) with Ki values of 7 nM. The slow onset of inhibition by 1400W showed saturation kinetics with a maximal rate constant of 0.028 s-1 and a binding constant of 2.0 microM.

L-Canavanine sulfate is a potent and selective inhibitor of inducible NO synthase with antimutagenic activity.

L-NIL is a selective inhibitor of inducible nitric oxide synthase (iNOS) (IC50 = 3.3 μM for miNOS) with anti-inflammatory activity.