Fig. 21

Quantitation of cat-attracting compounds in plants using GC-MS. The plant tissues used for this analysis were fresh samples. They were taken from the same bags of plant material that were used for the 10 × 10-h testing. Amounts are reported as microgram per gram plant material, except for the tinctures (μg/mL tincture). Tinctures were made by adding 5 volumes ethanol (500 ml) to one volume of plant tissue (10, 20, and 50 grams for catnip, Tatarian honeysuckle, and valerian root, respectively). Dashes indicate that the compound was not detected. Numbers are rounded to the nearest half. Reported values are the average of three separate extractions of the plant material. Unrounded numbers with standard error of the mean are shown in Additional file 1: Figure S12. Where compounds (3) and (4) are reduced forms of compound (1), trans-dihydronepetalactone and trans-isodihydronepetalactone are reduced forms of compound (2). Trans-dihydronepetalactone and trans-isodihydronepetalactone were not used in the bioassays with domestic cats