FIG 3.
Structural characterization of koreenceines. (A) Chemical structures of compounds 1 to 4. (B) Key COSY and HMBC NMR correlations of compounds. (C) ΔδS-R (in ppm) for the MTPA esters of compound 4.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.