The Constituents of Steam Volatile Oil from Brassica rapa L. var laciniitolia Kitamura

Abstract

Steam volatile oils were obtained from Brassica raga L. var laciniitolia Kitamura collected in different districts. The oils were prepared by steam distillation from the leaves and stems. Each volatile oil was chemically separated into two fractions, and each fraction was investigated by IR, NMR, GC-MS and GLC.
The characteristic major components were 4-pentenonitrile, 5-hexenonitrile, 3-phenylpropiononitrile, 3-butenyl isothiocyanate, 4-pentenyl isothiocyanate, 5-methylthiopentanonitrile and 6-methylthiohexanonitrile. The minor components were dimethyl trisulfide, n-hexyl isothiocyanate, 2-phenylethyl isothiocyanate, 4-methylthiobutanonitrile, 7-methylthioheptanonitrile, 4-methylthiobutyl isothiocyanate and 5-methylthiopentyl isothiocyanate.