prov:value
| - alkyl, such as 2-amidinoethyl, N-hydroxyamidino-lower alkyl, such as N-hydroxy-amidino-methyl or -2-ethyl, halogen, for example fluoro, chloro, bromo or iodo, carboxy, lower alkoxycarbonyl, phenyl-, naphthyl- or fluorenyl-lower alkoxycarbonyl, such as
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