Retusin is an O-methylated isoflavone, a type of flavonoid. It can be found in Fabaceae species like Dipteryx odorata, in Dalbergia retusaRetusin (Dalbergia) on kanaya.naist.jp/ and in Millettia nitida.Interactions between thrombin and natural products of Millettia nitita var. hirsutissima using capillary zone electrophoresis. Shuyu Zhang, Jun Cheng, Wenjing Chen, Xiaomei Ling, Yuying Zhao, Jie Feng, Cheng Xiang and Hong Liang, Journal of Chromatography B, Volume 877, Issue 32, 15 December 2009, pages 4107-4114, It can also be found in Maackia amurensis cell cultures.Isoflavonoid production by callus cultures of Maackia amurensis. S.A Fedoreyev, T.V Pokushalov, M.V Veselova, L.I Glebko, N.I Kulesh, T.I Muzarok, L.D Seletskaya, V.P Bulgakov and Yu.N Zhuravlev, Fitoterapia, 1 August 2000, Volume 71, Issue 4, Pages 365–372,

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