Xanthrysols A−D, Novel Meroterpenoids with Antiviral Activities from Xanthostemon chrysanthus

(+)/(−)-Xanthrysol A (1), an enantiomeric pair of novel macrocyclic meroterpenoids, along with three enantiomeric pairs of biogenetically related meroterpenoids (+)/(−)-xanthrysols B–D (2−4), were isolated and identified from the leaves of...