title: Complete 1H and 13C data assignments of two new guaianolides isolated from Ainsliaea fragrans.
abstract: Two new guaianolides, 8alpha-hydroxy-11alpha,13-dihydroglucozaluzanin C and 11alpha,13-dihydroglucozaluzanin C, were isolated from Ainsliaea fragrans, along with two known guaianolides, 8alpha-hydroxy-11alpha,13-dihydrozaluzanin C and glucozaluzanin C. The structures of the new compounds were unambiguously established by HR-ESI-MS, one-dimensional (1D) (DEPT), two-dimensional (2D) ((1)H-(1)H COSY, HSQC, HMBC, ROESY) NMR experiments and by comparison with structurally related compounds. The known compounds were identified by comparison of spectral data with published references. Some NMR data of the known compounds were reported for the first time.
authors: Shanghai Zhongchuang Medicinal Science and Technology Co., Ltd, 396 Lishizhen Road, Shanghai 201203, China.
authors: Xingshang
authors: X
authors: Li
authors: Jiangyun
authors: J
authors: Liu
authors: Jinna
authors: J
authors: Cai
authors: Peilie
authors: P
authors: Cai
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013058:Mass Spectrometry; D015394:Molecular Structure; D011522:Protons; D045789:Sesquiterpenes, Guaiane / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D011522:Protons; D045789:Sesquiterpenes, Guaiane