Jeevan Kumar Prasain, Yasuhiro Tezuka, Jian-Xin Li, Ken Tanaka, Purusotam Basnet, Hui Dong, Tsuneo Namba and Shigetoshi Kadota
Calyxins A (1), E (2) and F (3), 6-hydroxycalyxin F (4), Calyxin G and epicalyxin G (5 and 6), novel diarylheptanoids having a chalcone or a flavanone moiety, were isolated from Alpinia blepharocalyx K. Schum. and their structures, including the corrected one of calyxin A (1), were elucidated by spectroscopic methods.