4-membered

[网络] 4元

网络



双语例句

  1. An unsaturated 4-membered nitrogenous and phosphorous heterocycle has been synthesized and characterized. THE HYDROGENATION OF UNSATURATED COMPOUNDS OVER SUPPORTED PALLADIUM CATALYSTS
    合成了含氮、磷四元不饱和化合物.负载型钯催化剂用于不饱和化合物的加氢反应