definiens: means, on a country - by - country and Product - by - Product basis, subject to Section 6.4.2:(a ) for Products containing BSP Development Compounds that are Small Molecule CollaborationCompounds, the period commencing upon First Commercial Sale of such Product in the country of sale and ending on thedate that is the last to occur of : - 17 -(i ) expiration of the last Valid Claim of [ * * * ] covering [ * * * ] Compound in such country;(ii ) expiration of the last Valid Claim of [ * * * ] covering [ * * * ] in each case that is not described insubsection ( i ) and that covers [ * * * ] such Product in such country;(iii ) expiration of the last Valid Claim of [ * * * ] that is not described in subsection ( i ) or subsection ( ii),that covers [ * * * ] and that issues from a patent application, or claims priority to [ * * * ], that was [ * * * ] such Product;(iv ) expiration of all applicable Exclusivity Extensions in such country with respect to such Product ; or(v ) ten ( 10 ) years after First Commercial Sale of such Product in such country