| http://www.w3.org/ns/prov#value | - Examples of the halogen atom include chlorine,bromine, fluorine or iodine.Among them, preferred example of Ring A includes a benzene ring of the formula (5): ##STR6## wherein R is a hydrogen atom, a methyl group, a methoxy group or chlorine, and preferred example of Ring B includes a benzene ring substituted by amethoxy group or a methyl group at 4-position thereof.
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