<b><i>Ent</i>-kaurene and <i>ent</i>-beyerene diterpenoids and other constituents of <i>Thecacoris batesii</i></b>

Abstract

Two novel diterpenoids, thecacorins A (1) and B (2), were isolated from Thecacoris batesii and their structures were established as ent-3β,20-epoxy-16-kaurene-3αα,12β-diol and ent-15-beyerene-2β,3β-diol, respectively, on the basis of extensive spectroscopic analysis, especially, 1D NMR spectra, in conjunction with 2D experiments, COSY, NOESY, HMQC and HMBC.

Keywords

• Diterpenoids
• Thecacorin A
• Thecacorin B
• <i>Ent</i>-3&beta
• 20-epoxy-16-kaurene-3&alpha
• 12&beta
• -diol
• <i>Ent</i>-15-beyerene-2&beta
• 3&beta
• -diol
• <i>Thecacoris batesii</i>