div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: A New 2Π–X2Π Band System of Nitrogen Sulphide src=https:reader030fdocumentorgreader030viewer2022020119575068221a28ab0f07aec11bhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1963 Nature Publishing Grouppdiv