Three New Daphne Diterpenes from the Buds of Daphne genkwaSieb. etZucc. Processed by Rice Vinegar

Three new Daphne diterpenes, yuanhuaoate A (1), yuanhuaoate B (2), and yuanhuaoate C (3), were isolated from the buds of Daphne genkwaSieb. etZucc. processed by rice vinegar. Their structures and relative configurations were established by analysis of spectroscopic data. Their absolute configurations were assigned by the CD technique, applied for the first time to Daphne diterpenes.