The main routes are ring hydroxylation at position 13 and 14 (rats) (also at 12 (human)?), indole 2,3-double bond oxidation to 2-oxo-2,3-dihydro-LSD, partialy followed by aromatization to the respective naphtalene derivative, and de-alkylation to ethyl-lysergamide and lysergamide. The hydroxylated compounds are the excreted as their glucuronidates.