Applications of OR/ECD/VCD to the structure elucidation of natural products Dedicated to Professor Dr Sandor Antus on the occasion of his 75th anniversary.

The principles and applicability of optical rotation, and electronic and vibrational circular dichroism aided by quantum chemical calculations are presented to determine absolute configuration and conformation through examples of stereochemical analysis of natural products with emphasis on the possibility of combined analysis and pitfalls for natural product chemists.