Heterocyclic compounds as Janus kinase inhibitors

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(57) Abstract : The invention provides compounds of formula (I) : (Formula (I)), or a salt thereof as described herein. The inven- tion also provides pharmaceutical compositions comprising a compound of formula (I), processes for preparing compounds of for- mula (I), intermediates useful for preparing compounds of formula (I) and therapeutic methods for suppressing an immune re- sponse or treating cancer or a hematologic malignancy using compounds of formula (I).