F-2 was also obtained by fractionation of the MeOH-insoluble fraction (residue), but was insufficient to use GM-CFC assay. Therefore, we could not include the data of F-2.
Stimulation index was calculated using the following formula: Stimulation index = No. of GM-CFC on sample well/No. of GM-CFC on control well. Values more than 1.3 are in boldface.