论文部分内容阅读
The title compound,(1α,6β,11β,14α)-1,7:6,20-diepoxy-6,11-dihydroxy-6,7-seco-ent-kaur-16-ene-7,15-dione-14-acetate (macrocalyxin J),is a diterpenoid which was isolated from the leaves of Rabdosia macrocalyx and characterized by single-crystal X-ray diffraction. It cry-stallizes in orthorhombic,space group P212121 with a=9.3608(8),b=14.9787(12),c=15.5750(13) ,Z=4,V=2183.8(3) 3,C22H30O9,Mr=438.46,Dc=1.334 g/m3,μ(MoKα)=0.103 mm1,F(000)=936,the final R=0.0532 and wR=0.1262 for 2252 observed reflections (I > 2σ(I)). In the molecule,three six-membered rings adopt chair,boat and slightly distorted boat conformations,respectively,while both five-membered rings have approximate envelope conformations.
The title compound (1α, 6β, 11β, 14α) -1,7: 6,20-diepoxy-6,11-dihydroxy-6,7-seco-ent-kaur-16-ene-7,15-dione- 14-acetate (macrocalyxin J), is a diterpenoid which was isolated from the leaves of Rabdosia macrocalyx and characterized by single-crystal X-ray diffraction. It cry-stallizes in orthorhombic, space group P212121 with a = 9.3608 (8), b = 14.9787 (12), c = 15.5750 (13) , Z = 4, V = 2183.8 33, C22H30O9, Mr = 438.46, Dc = 1.334 g / The final R = 0.0532 and wR = 0.1262 for 2252 observed reflections (I> 2σ (I)). In the molecule, three six-membered rings take the chair, boat and slightly distorted boat conformations, respectively, while both five-membered rings have approximate envelope conformations.