ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 13, Number 1
JKCSEZ 13(1)
February 20, 1969 

Jalapin purified from the tubers of the sweet potato (Ipomoea batatas) was deacylated and subjected to structural elucidation. Complete and degraded acid hydrolyses indicated the presence of L-rhamnose, D-fucose and D-glucose in the molar ratio of 1: 1: 1 and in the increasing order of acid-stability. While two moles of periodate were consumed per mole of the product, D-glucose survived in the oxidation. The following structure was, therefore, proposed tentatively for the deacylated jalapin: L-Rhaf-(1→4)-D-Fucp-(1→3)-D-Glup-(1→11)-jalapinolic acid.