Inhibitory effects of flavonoids isolated from Sophora flavescens on indoleamine 2,3-dioxygenase 1 activity. - Kwon, Mincheol; Ko, Sung-Kyun; Jang, Mina; Kim, Gun-Hee; Ryoo, In-Ja; Son, Sangkeun; Ryu, Hyung Won; Oh, Sei-Ryang; Lee, Won-Kyu; Kim, Bo Yeon; Jang, Jae-Hyuk; Ahn, Jong Seog (Journal of Enzyme Inhibition & Medicinal Chemistry, 2019)