What do you understand by R Enantiomer?

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Warfarin (Coumadin) is given as a racemic mixture with the S enantiomer being four
times more active than the R enantiomer. If the mixture of Warfarin given is 50% S and
50% R, what is the potency compared with a 100% R enantiomer solution?

a) 4 * R + 1 * S = 1

b) 4 * R + 1 * S = 1.5

c) 4 * R + 1 * S = 2

d) 4 * R + 1 * S = 2.5

e) 4 * R + 1 * S = 4

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