7H-Furo[3,2-g][1]benzopyran-7-one,9-[[(2R)-3,3-dimethyl-2-oxiranyl]methoxy]-4-methoxy- 9-[[(R)-3,3-Dimethyloxiranyl]methoxy]-4-methoxy-7H-furo[3,2-g][1]benzopyran-7-one 7H-Furo(3,2-G)(1)benzopyran-7-one, 9-((3,3-dimethyloxiranyl)methoxy)-4-methoxy-, (R)- BYAKANGELICOL(P) 9-[[(2R)-3,3-Dimethyl-2-oxiranyl]methoxy]-4-methoxy-7H-furo[3,2-g][1]benzopyran-7-one Biacangelicol Byakangelicol, 98%, from Angelica dahurica (Fisch. ex Hoffm.) Benth. & Hook.f. ex Franch. & Sav. 9-[[(2R)-3,3-dimethyloxiran-2-yl]methoxy]-4-methoxyfuro[3,2-g]chromen-7-one