A new neo-clerodane diterpenoid, scutalpin A, has been isolated from S
cutellaria alpina. The structure of scutalpin A diacetoxy-6alpha-(2'S)
-methylbutyryloxy-4alpha,18; 8beta,13S-diepoxy-neo-clerodan-15,16-olid
e] was established by spectroscopic methods, including an X-ray diffra
ction analysis which provided its absolute stereochemistry.