The large discrepancy between calculated and reported optical rotations for two of four compounds (A-D) described previously as diastereoisomeric p-menth-1-ene-3,6-diols (I–IV) has been resolved by reassignment of configuration to diol B, m.p. 112°, and reassignment of constitution to diol A, m.p. 54°, a p-menth-2-ene-1,6-diol (VI). The set of four diastereoisomeric p-menth-1-ene-3, 6-diols has been