... 2,3dihydro-5,7-dihydroxy-2,6-dimethyl- 8-( 3methyl-2-butenyl )-4 H-1-benzopyran-4-one (27), 2,3-dihydro-5,7-dihydroxy-2,8-dimethyl- 6-( 3methyl-2-butenyl )-4 H-1-benzopyran-4-one (28), and 2,3-dihydro-5,7-dihydroxy-2,6,8-trimethyl4H-1-benzopyran-4-one ... 1-( 5,7-dimethoxy-2,2-dimethyl-2H-chromen-8-yl )-3 -methoxy-1butene (60), 1-( 5,7-dimethoxy-2,2-dimethyl-2H-chromen-8-yl )-3 -hydroxy-1-butene (61), 1-( 5,7dimethoxy-2,2-dimethyl-2H-chromen-8-yl )-3 -methylpentan-1-one (62), and 2-( 4-( 5,7-dimethoxy2,2-dimethyl-2H-chromen-8-yl )-4 -oxobutan-2-yl)malonate ... (50), 8-[ 1’-oxo-3’(R)propoxy-butyl ]-5 ,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (51), 8-[ 1’-oxo-3’(R)-isopropoxybutyl ]-5 ,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (52), 8-[ 1’-oxo-2’-en-butyl ]-5 ,7-dimethoxy-3nitro-2,2-dimethyl-2H-1-benzopyran...