div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: 3C 28 16 20 k 0 Gabriel A Hofmann A OH OH OH N02 28 16 20 k 0 Gabriel A Hofmann A OH OH OH N02 N02 10 20 O Y Claisen 5 pyrrole 10 HCI @ N02 H2 Ni NaN02 src=https:reader036fdocumentsplreader036viewer2022071515613704380ad5d206764858d7html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv