https://www.thevespiary.org/rhodium/Rhodium/chemistry/codeine2morphine.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/codeine2morphine.html)
https://opium.poppies.org/index.php?s=018b47d53440550540432c0e7cb2cdb9&act=SF&f=15 (https://opium.poppies.org/index.php?s=018b47d53440550540432c0e7cb2cdb9&act=SF&f=15)
http://www.poppies.org/cgi-bin/forum/forum.cgi (http://www.poppies.org/cgi-bin/forum/forum.cgi)