prov:value
| - ? is a bond or C1-4alkylene group, L is (a) a bond, (b) an optionally substituted aromatic ring group, (c) ???O???, (d) ???S???, (e) ???CO???NH??? or (f) ???NH???CO???, n is an integer of 0 to 3, and M is an amino group, a guanidino group, a sulfamoyl group, a carbamoyl group or a hydroxy group (provided that when X?????? and L are a bond, n is not 0)]; and the like.
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