The crystal structure of the natural terpene derivative (2,4-dihydroxy-3,6-dimethoxy- pheny1)((1R,2S,3S,4R,7R)-7-isopropy1-5-methy1-3-pheny1bicyclo[2.2.2]oct-5-
An arylhydrazono-containing coumarin derivative(1) can undergo chemical conversions in two modes. When in the presence of Cu^2+, a Cu2+-promoted cyclization rea