A Utilization of the Selective Inept Experiment for the Structure Elucidation of Oxygenated Chromenes

Abstract
A utilization of the selective INEPT experiment in which polarization transfer is effected through the chelated hydroxyl groups is described for the structure elucidation of two isomeric chromene derivatives, drummondin C (1) and isodrummondin C (2) from Hypericum drummondii (Grev. & Hook.) T. & G.