Diterpenoids from Casearia sylvestris.

Two highly oxygenated clerodane diterpenes casearins U (<bold>1</bold>) and V (<bold>2</bold>) and two <italic>ent</italic>-kaurane diterpene glucosides sylvestrisides A (<bold>3</bold>) and B (<bold>4</bold>) were isolated from the leaves of <italic>Casearia sylvestris</italic>, together with 13 known compounds. Their structures were established on the basis of 1D and 2D NMR spectroscopic analyses and comparison with literature data. [ABSTRACT FROM AUTHOR]