benzomalvin b

Benzomalvin B is a fungal metabolite originally isolated from Penicillium. It acts as an antagonist of neurokinin-1 (NK1) receptors, inhibiting binding of substance P by 24% in vitro when used at a concentration of 100 μg ml.

Benzomalvin C is a weak antagonist of the neurokinin-1 (NK1) receptor inhibiting binding of substance P by 46% when used at 100 μg ml in vitro. It is also a weak inhibitor of indolamine 2,3-dioxygenase (IDO) with an IC50 value of 130 μM for recombinant IDO. It was isolated from Penicillium and contains an epoxide group at C-19 and C-20, which is not present in benzomalvins A, B, or E.