definiens: means, with respect to a particular Product ( the ), one or more Third Party product(s ), where ( i ) such Third Party product(s ) ( a ) are approved in reliance, in whole or in part, o n a prior Regulatory Approval of the Reference Product [ * * * ] ( b ) are determined by a Regulatory Authority to be substitutable for the Reference Product, [ * * * ] ( ii ) such Third Party product(s ) when taken in the aggr egate have a market share ( measured in number of prescriptions w ith the numerator of such fractional share being su ch Third Party product(s ) taken in the aggregate, and the de nominator being the total of such Third Party produ ct(s ) taken in the aggregate plus such Product taken in the agg regate, as provided by IMS ) during the applicable C alendar Quarter in such country of at least [ * * * ] %