definiens: means, with respect to each Licensed Product and each country or other jurisdiction in the Territory, the period beginning on the date of the First Commercial Sale of such Licensed Product in such country or other jurisdiction, and en ding on the later to occur of ( a ) the expiration, invalidation or abandonment date of the last : ( i ) Licensor Background Patent, ( ii ) Licensor Program Patent, or ( iii ) [COMPANY] Program Patent that claims the molecular structure of a Discovery PDC or [COMPANY] Pr obody ; any of which ( i ), ( ii ), or ( iii ) includes a Valid Claim that covers the manufacture, use or sale of such Licensed Product in such country or other jurisdiction, ( b ) the expiration of Regulatory Exclusivity in such country or other jurisdiction for s uch Licensed Product or ( c ) the tenth ( 10th ) anniversary of the First Commercial Sale of such Licensed Product in such country or other jurisdiction