| http://www.w3.org/ns/prov#value | - More preferably, the substituent R1 represents ???C(O)???B???X??????R7 or ???(CHR5)m-B???X??????R7 where m is an integer of 0 to 2; R5 represents C1-C3-alkyl; B represents a direct bond, C5-C6-cycloalkyl optionally containing oxo, or 5??6-membered heterocycle or heteroaryl, each of which includes 1??3 heteroatoms selected from O, S and N atoms; X??? represents a direct bond, ???C(O)???, ???SO2???,
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