Two new bromoindole alkaloids have been isolated from the ethanolic extract of the red alga Laurencia similis. On the basis of chemical and spectroscopic methods （including 1D and 2D NMR technique）, their structures...Two new bromoindole alkaloids have been isolated from the ethanolic extract of the red alga Laurencia similis. On the basis of chemical and spectroscopic methods （including 1D and 2D NMR technique）, their structures have been elucidated as 2,2＇,5,5＇,6,6＇- sixibromo-3, 3＇-bi-lH-indole and 3, 5-dibromo-1-methylindole, respectively.展开更多
Two new norisoprenoid derivatives have been isolated from the red alga Gymnogongrus flabelliformis. Their structures were elucidated as （3R, 6R, 7E）-（＋）-3-O-phenylacetyl-4,7-megas- tigmadiene-9-one and （3R,TE）-...Two new norisoprenoid derivatives have been isolated from the red alga Gymnogongrus flabelliformis. Their structures were elucidated as （3R, 6R, 7E）-（＋）-3-O-phenylacetyl-4,7-megas- tigmadiene-9-one and （3R,TE）-（-）-3-O-phenylacetyl-5,7-megastigmadiene-9-one, respectively, by spectroscopic methods including HRMS, 1D and 2D NMR techniques.展开更多
基金supported by NSFC(No.30530080)National 863 project(No.2007AA09Z410,No.2006AA06Z362,2007AA091604)+1 种基金National Science & Technology Pillar Program(No.2006BAB03A12)key Innovative Project of the Academy(No.KZCX2-YW-209).
文摘Two new bromoindole alkaloids have been isolated from the ethanolic extract of the red alga Laurencia similis. On the basis of chemical and spectroscopic methods （including 1D and 2D NMR technique）, their structures have been elucidated as 2,2＇,5,5＇,6,6＇- sixibromo-3, 3＇-bi-lH-indole and 3, 5-dibromo-1-methylindole, respectively.
文摘Two new norisoprenoid derivatives have been isolated from the red alga Gymnogongrus flabelliformis. Their structures were elucidated as （3R, 6R, 7E）-（＋）-3-O-phenylacetyl-4,7-megas- tigmadiene-9-one and （3R,TE）-（-）-3-O-phenylacetyl-5,7-megastigmadiene-9-one, respectively, by spectroscopic methods including HRMS, 1D and 2D NMR techniques.
