| http://www.w3.org/ns/prov#value | - no group, a sulfo-group-substituted alkyl carbamoyl group, a sulfo-group-substituted phenyl carbamoyl group or a sulfo-group-substituted naphthyl carbamoyl group; X1 represents hydrogen, Na, K, Li or an organic amine; n1 is an integer of 1 or 2; and n2 is an integer of 0 through 3; ##STR8## wherein R2 represents hydrogen or an alkyl group; R3 and R4 independently represent hydrogen, an alkyl group
|
