Patent ID: 8481741

Claim:
A compound of the following formula (I), Wherein, Z is OR or NH 2 ; R is hydrogen, C1-C10 linear or branched alkyl, C2-C5 alkenyl, aryl, or C1-C5 alkyl substituted with aryl; R 1 and R 2 are each independently hydrogen, formyl, C1-C10 alkyl, C2-C10 alkenyl, aryl, C1-C10 alkyl substituted with aryl, C1-C10 alkylcarbonyl, arylcarbonyl, C1-C10 alkylcarbonyl substituted with aryl, C1-C10 alkoxycarbonyl, or C1-C10 alkoxycarbonyl substituted with aryl; and R 3 is C1-C10 alkyl, C2-C10 alkenyl or aryl, wherein the alkyl is optionally substituted with halogen, alkoxy, aryl, or a heterocyclic group having 1-2 heteroatoms selected from the group consisting of O and N, wherein the heterocyclic group is optionally substituted with C1-C10 alkyl or C1-C10 alkoxy; wherein the aryl is phenyl or an aromatic heterocyclic group.