Ent-Kaur-16-en-19-al

Abstract

The title ent-kaurane diterpene compound, C20H30O, was isolated from the roots of Bruguiera cylindrica (Rhizophoraceae), a mangrove plant. The molecule contains a fused four-ring system, with the three cyclohexane rings in standard chair conformations and the cyclopentane ring adopting an envelope conformation. The aldehyde is bisectionally attached to the cyclohexane ring. The methylene group is coplanar with the attached cyclopentane ring. In the crystal structure, molecules are packed by van der Waals interactions.