A New Monoterpene-Flavanone Conjugate from the Aerial Parts of Chimonanthus grammatus

A new monoterpene-flavanone conjugate, grammatin A (1), along with four known compounds (2–5), were isolated from the aerial parts of Chimonanthus grammatus. Their structures were elucidated through extensive analysis of NMR spectroscopic data in combination with the reported literature. All these compounds were isolated from this plant for the first time.