THE STRUCTURES OF CUCURBITAClN Ⅱ a AND Ⅱ b FROM HEMSLEYA AMABILIS
CHEN WEI-HSIN, NIEH SHUI-LIN, CHEN YU-CHUN, HSIA KE-MING
Acta Chimica Sinica . 1975, (1): 49 -56 .