Fifteen diterpenes have been isolated from the stem bark of Casearia corymbosa. Nine of these are novel and have been characterized, on the basis of spectral data and comparison with known compounds, as (relative stereochemistry) ent-2β-hydroxy-3,4-dihydro-4α-isozuelanin, ent-3,4-dihydro...
(1) nine new highly oxidized diterpenoids named corymbotins A-I from the leaves of Casearia corymbosa (Panama); (2) two novel ant-repellent and two simpler clerodane diterpenoids, named as cornutins A-D, and a known phenolic glycoside from the leaves of Cornutia grandifolia (Panama); (...