Fig. 1. Chemical structures. 1, (1R,4aS,7S,7aR)-nepetalactol; 2, (1S,4aR,7R,7aS)-nepetalactol; 3, (1S,4aR,7S,7aS)-nepetalactol; 4, (1R,4aR,7S,7aS)-nepetalactol; 5, (4aS,7S,7aR)-nepetalactone; 6, (4aR,7R,7aS)-nepetalactone.