| abstract |
A 1,3-dithiole derivative having the formula:wherein each of R<sup>1</sup> and R<sup>2</sup> is a substituted or unsubstituted alkyl, cycloalkyl, lower alkenyl, lower alkynyl, aryl or aralkyl group or R' and R<sup>2</sup> together form a substituted or unsubstituted alkylene or alkenylene group having from 3 to 6 carbon atoms, which may contain a cycloalkylene group, an o-phenylene group or a hetero atom selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom which may have a substituent, and Q is an acid residue. |