摘要:
2D-NOESY in conjunction with aromatic solvent induced shifts (ASIS) allowed unequivocal assignments of methoxyl resonances in polymethoxylated pyranoflavones thus providing an additional aid for the structural elucidation of natural products. In addition, the unusual nOe interactions observed in 2′-substituted B-ring flavones with H-3 or H-4″ of the pyran ring suggested hindered rotation of the B-ring.
ISSN:0038-7010
DOI:10.1080/00387019108020682
出版商:Taylor & Francis Group
年代:1991
数据来源: Taylor