The chemistry of Eremophila SPP—VI* : Stereochemistry and crystal structure of dihydroxyserrulatic acid

Abstract The structure of the title compound has been shown to be ( 6 ), a diterpenoid analogue of the cadinene group. Standard degradation has given the naphthalene ( 14 ). The relative stereochemistry is established by crystal structure of dihydroxyserrulatic acid which has been determined by X-ray diffraction at 295 K, and refined by least squares to a residual of 0.059 for 1480 observed reflections. Crystals are orthorhombic, P 2 1 2 1 2 1 , a = 15.514 (3), b =14.029 (3), c =8.681 (2)A, Z =4.