Atknowiedyertzents-- The authors are grateful to Dr T Tanakd
(Sankyo Co, Ltdj for provlston of tannase They are also
Indebted to Mr Y Tanaka, MISS Y Soeda and Mr R Isobe for
‘H and *lC NMR and MS measurements, and to the staff of the
Central Analysis Room of this Umverslty for elemental analysis