TY - RPRT TI - Characterizing challenging microcrystalline solids with solid-state NMR shift tensor and synchrotron X-ray powder diffraction data: structural analysis of ambuic acid. AU - James K Harper AU - David M Grant AU - Yuegang Zhang AU - Peter L Lee AU - Robert Von Dreele PY - 2006 DO - 10.1021/ja055570j UR - https://pubmed.ncbi.nlm.nih.gov/16448125/ ID - 16448125 ER -