or lower alkyl group having not more than 6 carbon atoms: and R1 is -CO3, -NH2, -NHR2, -N(R2)2, -(CH=CH)n -W or a substituted or non-substituted phenyl group, wherein Q and R2 are as above defined, n is an integer of 1 to 3, W is an aromatic group, heterocyclic group or a group represented by the following general formula (3) ##STR62## wherein Z is an oxygen atom or a sulfur atom; and R3 is a low