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A series of novel hexahydrothiopyrano[4,3-c]pyrazoles and related analogues were prepared and tested for antiinflammatory activity by using the mouse active Arthus reaction and the delayed hypersensitivity skin reaction in guinea pigs as primary screens. The compounds of most interest, 18 and 28, were further tested in a model of adjuvant-induced arthritis; in this system, both compounds were active when dosed intraperitoneally but failed to produce significant activity when dosed orally at subtoxic doses.
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Rovnyak et al. (1982) studied this question.
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