A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL. The file type is application/pdf.
application/pdf
M. Iqbal Choudhary, Alain Meli Lannang, Shazia Anjum, Hoong-Kun Fun, David Lontsi, Jean Gustave Tangmouo. "1,13-Dimethyl-6H,7H,8H-chromeno[3′,4′:5,6]pyrano[3,2-c]chromene-6,8-dione." Acta Crystallographica Section E 62.1 (2005) o116-o118