prov:value
| - teroaryl, arylalkyl, heteroarylalkyl or perhaloalkyl, or allyl; andR6 is H or C1-8 alkyl;wherein heteroaryl is pyrrolyl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, furanyl, pyranyl, thienyl, benzimidazolyl, quinolinyl, Isoquinolinyl, oxazolyl, thiazolyl or thiadiazolyl;or a pharmaceutically acceptable salt, solvate or hydrate thereof provided that:(i) if R6 is other than H
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