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.
Structure of the secondary metabolites belonging to the pyranocoumarin family isolated from NTR and ATR fractions by low-pressure column chromatography and HPLC separation. 1H-NMR, 13C-NMR and MS spectra are reported in Supplementary Information.
