| http://www.w3.org/ns/prov#value | - Compounds of the formula ##STR1## in which R is an alkyl radical having from one to six carbon atoms, a benzyl radical C6 H5 CH2 --, or the radical --(CH2)2 OH; X- is halogen selected from the group consisting of chloride, bromide, and iodide, or CH3 OSO3 ; and y is an integer having a value of from four to eleven.
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