4,4-DIMETHYLAMINO-3-METHYL-2-BUTANONE
4,4-DIMETHYLAMINO-3-METHYL-2-BUTANONE ??
??
4,4-DIMETHYLAMINO-3-METHYL-2-BUTANONE C??? ??, ??, ??
4,4-DIMETHYLAMINO-3-METHYL-2-BUTANONE ?? ?? ? ???
???
?? ??
4,4-DIMETHYLAMINO-3-METHYL-2-BUTANONE ?? ??
???( 0)?? ??