prov:value
| - (9) One of X and Y is an alkyl group or when one of R10 and R11 is an alkyl group, said alkyl is selected from the group consisting of branched, straight-chain, cyclic, polycyclic, saturated and unsaturated alkyl groups which may be substituted with 0, 1 or more substitutents selected from the group consisting of aryl, keto, hydroxyl, alkoxyl, acyloxy, amino, N-acylamino, halogen, cyano and carbox
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