definiens: . Momenta Econom ic Interest means, with respect to a Post - Launch Quarter, the percentage ca lculated in accordance with the following table : Quarter Momenta Economic Interest ------- --------- ----------------- The [ * * ] Post - Launch Quarter thro ugh the [ * * ] Post - Launch The lesser of ( a ) the then - current Estimated Momenta Quarter, inclusve Economic Inter est of [ * * ] % or ( b ) the Actual Momenta Economic Interest f or the [ * * ] Post - Launch Quarter The [ * * ] Post - Launc h Quarter through the [ * * ] Post - Launch The lesser of ( a ) the then - current Estimated Momenta Quarter, inc lusive Economic Interest of [ * * ] % or ( b ) the Actual Moment a Economic Interest for the [ * * ] Post- Launch Quarter The [ * * ] Post - Launch Quarter through the [ * * ] Post - Laun ch The lesser of ( a ) the then - current Estimated Mom enta Quarter, inclusive Economic Interest of [ * * ] % or ( b ) the Actual Momenta Economic Interest for the [ * * ] Post - Launch Quarter The [ * * ] Post - Launch Quarter through the [ * * ] Post - Launch The lesser of ( a ) the then - cu rrent Estimated Momenta Quarter, inclusive Economic Inter est of [ * * ] % or ( b ) the Actual Momenta Economic Interest for the [ * * ] Post - Launch Quarter The [ * * ] Post - Launch Quarter through the [ * * ] Post - Launch Th e lesser of ( a ) the then - current Estimated Momenta Qu arter, inclusive Economic Interest of [ * * ] % or ( b ) the Actual Momenta Economic Interest for the [ * * ] Post- Launch Quarter The [ * * ] Post - Launch Quarter The les ser of ( a ) the then - current Estimated Momenta Economic Interest of [ * * ] % or ( b ) the Actual Momenta Economi c Interest for the [ * * ] Post - Launch Quarter The [ * * ] t hrough the [ * * ] Post - Launch Quarter, inclusive The Actual Momenta Economic Interest for the [ * * ] Post - Launch Quarter The [ * * ] Post - Launch Quarter in the [ * * ] and every The Actual Momenta Economic Interest for the [ * * ] subsequent Post - Launch Years Post - Launch Quart er in such Post - Launch Year Each of the [ * * ] Post - Laun ch Quarters in the [ * * ] and The Actual Momenta Economic Interest for the [ * * ] every subsequent Pos t - Launch Years Post - Launch Quarter in the prior Pos t - Launch Year . Momenta Sh are of Excess Costs means, with respect to a Post - Launch Quarter, the product of the New Excess Costs for such Post - Launch Quarter -72- EXECUTION COPY multiplied by the Momenta Economic Interest for suc h Post - Launch Quarter, as shall be adjusted from time to time pursuant to sub sections B.2 and C.2 of this SCHEDULE 4.3