1. (5 pts) Lanosterol (shown on the right) is found in the late stages of the biosynthetic pathway to the steroid cholesterol in humans. Work out how many stereocenters are present in lanosterol and then the configuration ( R or S ) of each of each stereocenter. Calculate how many total stereoisomers would be theoretically possible and discuss whether the terms meso, epimer, enantiomer, and diastereomer could be applied to the overall collection of isomers