BIOACTIVE MARINE METABOLITES .39. STEREOCHEMICAL CONTROL IN MICROBIAL REDUCTIONS .20. NAZUMAMIDE-A, A THROMBIN-INHIBITORY TETRAPEPTIDE, FROM A MARINE SPONGE, THEONELLA SP
Nazumamide A, a thrombin-inhibiting linear tetrapeptide, was isolated from a marine sponge, Theonella sp. The structure of nazumamide A was determined by interpretation of 2D NMR data and by chemical degradation as 2,5-dihydroxybenzoyl-L-arginyl-L-prolyl-L-isoleucyl-L-alpha-aminobutyric acid.