Fig. 1. The compounds described here are named and numbered according to the IUPAC- IUB 1973 Recommendations for Cyclitols (ref. 2). Thus Cl is the reference carbon for determining configurational series (L), except in 1, 2-unsaturated compounds, where the rcfercnce carbon is C-3. For convenience, only single enantiomers corresponding IO methyl r.-shikimate are depicted. hexene-1-carboxylate'(DL-4) with hydrogen peroxide and formic ...