in Community Health - Mauritius) [ edit ] Composition Typical asafoetida contains about 40-64% resin , 25% endogeneous gum , 10-17% volatile oil, and 1.5-10% ash . The resin portion is known to contain asaresinotannols 'A' and 'B', ferulic acid , umbelliferone and four unidentified compounds. [ 14 ] [ edit