ABCG2 and leukemia: Also the extracts from SY177 and SY179 showed good activities against the leukemia CCRF-CEM cells (IC50 value of 9.94 and 1.81 μg/mL respectively) and all the seven studied solid cancer cells, with the IC50 values below 10 μg/mL against MDA-MB231-BCRP (8.37 μg/mL for SY179), HCT116 WT (2.42 μg/mL for SY177 and 2.79 μg/mL for SY179).