(+)-4,4',7,7'-四甲氧基-5,5'-二甲基-8,8'-联(2H-1-苯并吡喃)-2,2'-二酮

(+)-4,4,7,7-Tetramethoxy-5,5-dimethyl-8,8-bi(2H-1-benzopyran)-2,2-dione · CAS 27909-08-6