| http://www.w3.org/ns/prov#value | - p or an alkoxyl group; and n is an integer of 1 to 3.The diamine compound of formula (Ia) can be synthesized, for example, by the following steps:(1) The following diamine compound of formula (II) to N-acetylation is subjected to N-acetylation to obtain an N-acetylated compound of the diamine compound of formula (II): ##STR213## wherein R.sup.4 is hydrogen, chlorine, methoxy group ormethyl group;
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