Lee, J.K. Min, S.-J. Cho, Y.S. Lee, K.S. Cha, J.H. 2024-01-20T15:02:00Z 2024-01-20T15:02:00Z 2021-08-31 2012-05 1600-5368 https://pubs.kist.re.kr/handle/201004/129322 In the title compound, C25H27NO5, each of the cyclohexenone rings adopts a half-chair conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. In the crystal, weak C - H？O hydrogen bonds link molecules into chains parallel to the c axis. English (E)-3,3,6,6-Tetramethyl-9-(2-nitrostyryl)-3,4,5,6,7,9-hexahydro-1H- xanthene-1,8(2H)-dione Article 10.1107/S1600536812023495 1 Acta Crystallographica Section E: Structure Reports Online, v.68, no.6 Acta Crystallographica Section E: Structure Reports Online 68 6 scie scopus 2-s2.0-84862275002 Article Single crystal X-ray Xanthene Structure determination Recrystallization