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Derivatives of dehydroabietic acid (1) having a hydrophilic moiety (such as amino, carbamoyl, carbamoyloxy, ureido, sulfamoyl, or sulfo) at positions 12 and/or 18 of the dehydroabietane nucleus were prepared and tested for antiulcer activity by means of antisecretory and antipepsin assays in rats. Among these compounds, the salts of 12-sulfodehydroabietic acid (62, 63, and 64) were found to exhibit remarkably high antipepsin activity without aldosterone-like activity.
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Wada et al. (1985) studied this question.
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