Abstract
1. After oral administration of acetylruthenocene to rats, metabolites were detected in bile and urine. 2. The major metabolite, which is present in both bile and urine, is a glucuronide with the structure: C5H5-Ru-C5H4-CO-CH2-O-C6H9O6 3. The metabolite was identified by mass spectrometry of the permethylated glucuronide and mass spectrometry and n.m.r. of the aglycone. 4. The nature of the metabolite is discussed, and a comparison is made with the metabolism of the benzene analogue, acetophenone.