Fun Hoong-Kun, Siridechakorn Ittipon, Laphookhieo Surat, Chantrapromma Suchada
Acta Crystallogr Sect E Struct Rep Online. 2011 Jul 1;67(Pt 7):o1706-7. doi: 10.1107/S1600536811022720. Epub 2011 Jun 18.
The title compound {systematic name: 7-meth-oxy-6-[(1R,2R,5R)-5-methyl-4-oxo-3,6-dioxabicyclo-[3.1.0]hexan-2-yl]-2H-chromen-2-one}, C(15)H(12)O(6), is a coumarin, which was isolated from the roots of Micromelum glanduliferum. There are two mol-ecules in the asymmetric unit with slight differences in bond angles. In both mol-ecules, the furan ring adopts a flattened envelope conformation. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions into chains along the a axis. Aromatic π-π stacking inter-actions with centroid-centroid distances in the range 3.6995 (11)-3.8069 (11) Å and C⋯O short contacts [3.030 (2)-3.171 (3) Å] also occur.
标题化合物{系统名称：7-甲氧基-6-[(1R,2R,5R)-5-甲基-4-氧代-3,6-二氧杂双环-[3.1.0]己烷-2-基]-2H-色原酮-2-酮}，C₁₅H₁₂O₆，是一种香豆素，从毛叶小芸木的根中分离得到。不对称单元中有两个分子，键角略有差异。在这两个分子中，呋喃环呈扁平信封构象。在晶体中，分子通过弱C-H⋯O相互作用沿a轴连接成链。还存在质心距离在3.6995 (11)-3.8069 (11) Å范围内的芳香π-π堆积相互作用以及C⋯O短接触[3.030 (2)-3.171 (3) Å]。
