| http://www.w3.org/ns/prov#value | - koxyl, carboxyl, amino or substituted amino, or R1 and R2 are taken together and are an amino or substituted amino derivative of a benzo group, and each of R3 and R4 is H, C1 -C6 alkyl or alkenyl, hydroxyl, C1 -C6 alkoxyl, carboxyl, amino or substituted amino.
|
