Perspective drawing, Fisher projections, CIP rules for assigning R/S stereodescriptors, D/S stereodescriptors, and stereochemical relationships, including enantiomers, diastereomers, and meso are desc...Perspective drawing, Fisher projections, CIP rules for assigning R/S stereodescriptors, D/S stereodescriptors, and stereochemical relationships, including enantiomers, diastereomers, and meso are described.