Isolation of 2,4,4′-trihydroxydeoxybenzoin and 3′- hydroxydaidzein from soybean miso

Abstract

Two 2,2-diphenyl-l-picrylhydrazyl (DPPH) radical- scavenging compounds were Isolated from soybean miso. They were determined to be 2,4,4′-trihydroxy- deoxybenzoin 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.