MARINE NATURAL-PRODUCTS - XENICIN - DITERPENOID POSSESSING A 9-MEMBERED RING FROM SOFT CORAL, XENIA-ELONGATA
MARINE NATURAL-PRODUCTS - XENICIN - DITERPENOID POSSESSING A 9-MEMBERED RING FROM SOFT CORAL, XENIA-ELONGATA
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DOI：
10.1021/ja00459a040
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发表时间：
1977-01-01
影响因子：
15
通讯作者：
VANDERHELM, D
中科院分区：
文献类型：
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作者：
VANDERAH, DJ;STEUDLER, PA;VANDERHELM, D
通过单晶 X 射线衍射测定了从软珊瑚 X. elongata 中分离出的新二萜类化合物 xenicin 的结构。 Xenicin 具有与二氢吡喃环融合的 9 元碳环。该晶体为单斜晶体，空间群 C2，4 个分子/晶胞，尺寸 a = 17.704 (3)、b = 9.061 (2)、c = 18.656 (4) ANG.； .beta。 = 113.33 (2)°..在自动衍射仪上收集强度数据(3015)。通过直接法确定的结构通过最小二乘法进行细化。所有数据的最终 R 值为 0.046。
The structure of a new diterpenoid, xenicin, isolated from a soft coral X. elongata, was determined by single crystal X-ray diffraction. Xenicin possesses a 9-membered carbocyclic ring transfused to a dihydropyran ring. The crystals are monoclinic, space group C2, 4 molecules/cell with dimensions a = 17.704 (3), b = 9.061 (2), c = 18.656 (4) .ANG.; .beta. = 113.33 (2).degree.. The intensity data (3015) were collected on an automatic diffractometer. The structure, determined by direct methods, was refined by least-squares methods. The final R was 0.046 for all the data.