The ic50 of the active agent purified by carbon column is 0 . 525 mg / ml , which is better than that of acarbose ( ic5o = 0 . 9mg / ml ) . the zymosis juice of w - 20 can greatly decrease hyperglycemia level of mice by alloxan in glucose tolerance test 该组分对ph稳定，在叫叶范围内，抑制率80 ：对热相对较稳定，在90以下仍有75的抑制率。过柱后的粗组分icso约为0
