| http://www.w3.org/ns/prov#value | - When R2 is an optionally substituted heteroaryl or heteroarylalkyl group the ring may be optionally substituted one or more times, preferably by one or two substituents, independently selected from one or more times, by C1-4 alkyl, halogen, especially fluoro or chloro, (CR10 R20)t OR11, (CR10 R20)t NR10 R20, especially amino or mono- or di-alkylamino --(CR10 R20)t S(O)m R18, wherein m is 0, 1 or 2
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