HMBC of Carbohydrates is Useful in Identifying Linkages C州 0 HSQC 2o HMBC ◆C外 OH k'e∂ 品Oc0 HG l9 “cg H因 、 C3) 冠 条乌自 #g创 H沟 华C) C 0 ) 最 +Cx) 平3) 4.0 3.5 5.0 4.6 H(ppm) H(ppm)
HMBC without 1J suppression 2 324 20 40 60 80 100 120 140 ppm ppm 7 6 5 3 2 For small molecule,the splitted 1J correlation can be intuitive to identify HSQC peaks Less s/n compared with HSQC May need to adjust the long range J coupling
HMBC without 1J suppression For small molecule, the splitted 1J correlation can be intuitive to identify HSQC peaks Less s/n compared with HSQC May need to adjust the long range J coupling