prov:value
| - A derivative of p-guanidinobenzoic acid of the general formula (IA): ##STR40## wherein Y represents an oxygen atom or a sulfur atom and (a) when Y is an oxygen atom, (R1)m is selected from the group consisting of: 5-(4-guanidinobenzoyloxy)-3-methoxymethyl, 3,5-dicarboxy, 3,5-bis(isopropoxycarbonyl), 3,5-bistrifluoromethyl, 3-acetyl, 3,5-bis(N-ethylcarbamoyl), and 3,5-bis(N-propylcarbamoyl); (b) wh
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