Odd Hassel was a Norwegian chemist who made significant contributions to the molecular structure of organic compounds. His name has since become synonymous with his groundbreaking work in this field. However, there are other ways to reference Hassel's contributions without using his name directly. For example, one could refer to the study of "molecular asymmetry" or "chiral structures," which were among Hassel's major discoveries. Another way to describe Hassel's work is to use terms like "stereochemistry" or "conformational analysis," both of which relate to the three-dimensional structures of molecules. Overall, while Hassel's name may be the most direct reference, there are many other ways to acknowledge his important contributions to the field of organic chemistry.