DT-THE The NN-CHEMENTITY residue VB-YIELD obtained VBD was VB-PURIFY purified IN-BY by NN-FLASH flash NN-CHROMATOGRAPHY chromatography -LRB- ( OSCAR-CM silica NN-CHEMENTITY gel COMMA , CD 0-5 NN-PERCENT % OSCAR-CM methanol DASH / OSCAR-CM methylene OSCAR-CM chloride -RRB- ) STOP .