div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader043vdocumentsmxreader043viewer2022020311575003551a28ab11489892f2html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: ChemInform Abstract: Five-Membered Monoheterocyclic Compounds Amaryllidaceae Alkaloids src=https:reader043vdocumentsmxreader043viewer2022020311575003551a28ab11489892f2html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divp1997 organic chemistry reviewp porganic chemistry reviewZ 0200p p49 - 331Five-Membered Monoheterocyclic Compounds Amaryllidaceae Al-kaloids — 100 refs — LEWIS J R Rodd’s Chem Carbon Compd2nd Ed 4 1997 PtB 165-249 Neth ENp p1pdiv