prov:value
| - HO2C???CR5R6-A1-X1-A2-R7 [0061] wherein R5 is a hydrogen, a hydroxy, an alkoxy, an acyloxy, an amino, an alkylamino, a halogen; R6 is a hydrogen, an alkyl, or a halogenoalkyl; A1 and A2 is the same or different, each is direct link or alkylene; X1 is a halogen, an oxygen, a sulfur, a sulphinyl, a sulphonyl, an amino, an alkylimino, or an alkylene; and R7 is a hydrogen, a halogen, an alkoxy, a halo
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