... Tetrahedron. Volume 44, Issue 14, 1988, Pages 4313-4320. Cover image. Deoxygenation reactions of c 19 -diterpenoid alkaloids. ... An improved partial synthesis of hypaconitine (35) from aconitine (24) is also presented. Download full text in PDF. Tetrahedron Vol. 44, No. 14, pp. ...