CAS Registers 40 Millionth Substance
azulenobenzofuran derivative rel-(1R,2aR,5aR,7S,10bR,10cR)-1,2a,3,4,5,5a,6,7,8,9,10,10b-dodecahydro-1-phenyl-7,10c-epoxy-10cH-azuleno[4,5,6-cd]benzofuran
"On November 21, CAS Registry Number 1073662-18-6 was assigned to the azulenobenzofuran derivative at right. CAS REGISTRY, the world's most authoritative collection of disclosed chemical substance information, now includes 40 million organic and inorganic substances. More than 100 million CAS Registry Numbers have been assigned to organic and inorganic substances and biosequences.
The 40 millionth substance was identified by CAS scientists in a journal article published in Angewandte Chemie International Edition:
* Oh, C.H.; Lee, J.H.; Lee, S.J.; Kim, J.I.; Hong, C.S. Intramolecular Huisgen-Type Cyclization of Platinum-Bound Pyrylium Ions with Alkenes and Subsequent Insertion into a Benzylic C-H Bond. Angew. Chem. Int. Ed. 2008, 47, 7505-7507."
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