The stereospecificity of the thermal cleavage of pyrazolines is lacking although stereoselectivity does exist. 二氢吡唑热解虽然有立体选择性，但没有立体定向性。
In these containers, bimolecular reactions between specially selected guests proceed with high regio- and stereoselectivity. 在这些容器，双分子之间的反应，特别挑选客人进行高区选和立体选择性。
