A new clerodane, 15-hydroxy-16-oxo-15,16H-hardwickiic acid (15-hydroxycleroda-3,13-dien-15,16-olide-18-oic acid) has been isolated from the aerial parts of Grangea maderaspatana, besides the known clerodane diterpenes. (C) 1999 Elsevier Science Ltd. All rights reserved.