
TY  - JOUR
A1  - Hart, N 
A1  - Johns, S 
A1  - Lamberton, J 
A1  - Suares, H 
A1  - Willing, R 
T1  - New Alkaloids of the <I>ent</I>-Kaurene Type From <I>Anopterus</I> Species. II. The Structure of the Minor Alkaloids
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1976
VL  - 29
IS  - 6
SP  - 1319
EP  - 1327
KW  - 
UR  - https://doi.org/10.1071/CH9761319 
N2  - Anopterimine (2) is a new diterpenoid alkaloid, and on the basis of spectroscopic data it is considered to have the same carbon skeleton as anopterine. It is remarkable in having a C19-N azomethine system, while another minor base of A. macleayanus is anopterimine N-oxide (3). Two other new alkaloids, hydroxyanopterine and dihydroxyanopterine, both resemble anopterine, and spectroscopic data indicate that they have an additional hydroxy group at C1 or C3 on the A ring. Dihydroxy- anopterine has tiglic acid and the new acid, (E)-4-hydroxy-2-methylbut-2-enoic acid, as esterifying acids. A biosynthetic route to the Anopterus alkaloids is suggested. 
ER  -

