Enantiomeric pairs of meroterpenoids with 11/5/6 spiro-heterocyclic systems from Hypericum kouytchense

Six undescribed enantiomeric pairs of acylphloroglucinol related meroterpenoids, (+)/(–)-hyperkouytins A–F (1a/1b–6a/6b), were isolated from Hypericum kouytchense. These enantiomers were acquired by chiral-phase HPLC, and their structures were established by spectroscopic...