definiens: means a NIBRI HDAC Inhibitor Compound for whichNIBRI or its Affiliates have submitted an IND with the FDA and initiated a Phase I Clinical Trial prior to the FirstAmendment Date ; and ( ii ) a means any NIBRI HDAC Inhibitor Compoundother than a Prior Clinical NIBRI HDAC Inhibitor Compound . For the avoidance of doubt, any HDAC InhibitorCompound, the rights to which are licensed or otherwise acquired from a Third Party by NIBRI or its Affiliates, shall beconsidered to be a Prior Clinical NIBRI HDAC Inhibitor Compound if such Third Party ( or NIBRI or its Affiliates ) hassubmitted an IND [ .. * * .. ] CONFIDENTIAL TREATMENT REQUESTED24 with the FDA and initiated a Phase I Clinical Trial covering such HDAC Inhibitor Compound prior to the date of suchlicense or acquisition