X-Ray Structure Analysis of Nardin

Structural determination of nardin, a novel sesquiterpene acid, is reported. The crystal structure of this compound is determined by single crystal X-ray studies. X-ray crystallography revealed the presence of two conformers arising from the intermolecular hydrogen bond of the O-H center dot center dot center dot O type. The crystal of the compound belongs to the tetragonal crystal system and space group is P4(1)2(1)2 (or P4(3)2(1)2). Crystal data are as follows: a = 11.030 (3) angstrom, b = 11.030(3) angstrom, c = 43.350 (5) angstrom; v = 5274 angstrom(3); z = 16. The final R factors are R = 0.065 (for all 2399 I accepted reflections), R = 0.064 (for 2355 observed reflections).