Isolation of 2,4,4′-Trihydroxydeoxybenzoin and 3′-Hydroxydaidzein from Soybean Miso

Abstract

Two 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging compounds were isolated from soybean miso. They were determined to be 2,4,4′-trihydroxydeoxybenzoin and 3′-hydroxydaidzein on the basis of spectroscopic data. In the manufacturing process for soybean miso, 2,4,4′-trihydroxydeoxybenzoin appeared during culture aging, and the quantity of it increased in a time-dependent manner.