Y. Endo et al., CONFLUENTIC ACID AND 2'-O-METHYLPERLATOLIC ACID, MONOAMINE-OXIDASE-B INHIBITORS IN A BRAZILIAN PLANT, HIMATANTHUS-SUCUUBA, Chemical and Pharmaceutical Bulletin, 42(6), 1994, pp. 1198-1201
Monoamine oxidase B (MAO-B) inhibitors were isolated from the bark of
a Brazilian plant, Himatanthus sucuuba (SPR.). Assignments of the H-1-
and C-13-NMR data using two dimensional (2D)-NMR techniques showed th
e active components to be known lichen depsides, confluentic acid (1)
and 2'-O-methylperlatolic acid (2). The depside (1) showed selective i
nhibition of MAO-B with IC50 value of 0.22 mu M.