| abstract |
A compound of formula (I), ** (See formula) ** where R1 is H or (C1-C6) alkyl, in which the (C1-C6) alkyl group is unsubstituted or substituted with one or more OH groups, halogen or NH2; and R2 is phenyl, cycloalkyl (C3-C10) or a heterocyclyl (C4-C10) group that are unsubstituted or substituted with 1, 2 or 3 moieties independently selected from 1. (C1-C6) alkyl; 2. alkenyl (C2-C6), 3. alkynyl (C2-C6), ... |