| http://www.w3.org/ns/prov#value | - kyl group, R2, R3, and R4 each, independently of the others, are hydrogen atoms or alkyl groups, and X is an anion; (c) those of the general formula ##STR27## wherein R1 is an alkyl group, R2 and R3 each, independently of the other, are hydrogen atoms or alkyl groups, and X is an anion; (d) those of the general formula ##STR28## wherein R1 is an alkyl group, R2 and R3 each, independently of the ot
|
