The crystal structure of Di-nitratobis(ethylcaprolactam)uranyl(Ⅱ) UO<sub>2</sub>[CH<sub>2</sub>(CH<sub>2</sub>)<sub>4</sub>CONC<sub>2</sub>H<sub>5</sub>]<sub>2</sub>
A chiral liquid crystal crown ether containing diaza-18-crown-6 was synthesized with the help of CPK atomic model and in the meantime a nonchiral liquid crystal
A new naturally occurring compound 1-polyacetylene glycoside has been isolated form the n- butanol soluble fraction of the leaves of Bidens bipinnata. The chemi