g was subjected to vacuum liquid chromatography VLC using the following mixtures DCM MeOH , DCM MeOH , DCM MeOH , DCM MeOH , DCM MeOH , MeOH. DCM MeOH , DCM MeOH , DCM MeOH , DCM MeOH , DCM MeOH , MeOH. mg and it was further purified using semipreparative high pressure liquid chromatography HPLC to obtain.