新化合物的结构通过广泛的NMR或X-ray光谱分析确定为7-O-beta-D-allopyranosyl-5-hydroxy-2-methylchromone（corymbosin K1, 3），7-O-beta-D-6-acetylglucopyranosyl-5-hydroxy-2-methylchromone（corymbosin K2, 4），7-O-[6-O-(4-O-trans-caffeoyl-beta-D-allopyranosyl)]-beta-D-glucopyranosyl-5-hydroxy-2-methylchromone（corymbosin K3, 5）和7-O-[6-O-(4-O-trans-feruloyl-beta-D-allopyranosyl)]-beta-D-glucopyranosyl-5-hydroxy-2-methylchromone（corymbosin K4, 6）。化合物2-5经过体外实验检测其免疫调节活性。