 However, one should note that adding a chemical group to the prochiral center from the "Re"-face will not always lead to an ("S")-stereocenter, as the priority of the chemical group has to be taken into account.That is, the absolute stereochemistry of the product is determined on its own and not by considering which face it was attacked from.In the above-mentioned example, if chloride ("Z" = 17) were added to the prochiral center from the "Re"-face, this would result in an ("R")-enantiomer.