The effect of substituting silver for barium on the structure and superconducting properties of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-y</sub> has been studied. T
A new bisdesmosidic triterpene saponin,macranthoiside I,wasisolated from L.macranthoides.Its structure was determinedby chemical degradation and spectroscopic a
1. CCL is a monthly journal, published by the Chinese Chemical Society. CCL will publish preliminary accounts in the whole field of chemistry. In contrast to th