This is a report of the detection of 13-ethoxy-8alpha,13-epoxy-14,15,16-trinorlabdane (1) and 12-ethoxy-8alpha,12-epoxy- 13,14,15,16-tetranorlabdane (2), hitherto unidentified and considered as degradation products of ambrein, among 31 constituents found by analysis of ambergris tincture. Copyright (C) 2004 John Wiley Sons, Ltd.