Method of producing allergenic extracts

摘要

A method for the production of allergenic extracts comprising the extraction of an allergenic substance with a suitable solvent having incorporated therein a small but effective amount of a compound of the formula, <IMAGE> wherein Y is H or lower alkyl; Z is CH2; n is 0 or 1; R is alkylene or cycloalkylene; m is 0 or 1; W is CH2; and X is H, acyl or lower alkyl. The novel allergenic extracts produced by this process are also the subject of this invention.