| http://www.w3.org/ns/prov#value | - (13) Positive hole transport material in Japanese Laid-Open Patent Application No. 52-139065 ##STR116## wherein X is a hydrogen atom, a lower alkyl group, or a halogen atom; R141 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and A141 is a substituted amino group, or a substituted or unsubstituted aryl group.
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