prov:value
| - oatom(s) selected from oxygen, sulfur and nitrogen, etc.), R5 is a hydrogen atom, a C1-6 alkyl group, etc., X is O, S, SO2 or NR6 (R6 is a hydrogen atom, a C1-6 alkyl group or an aryl group), R7 is a hydrogen atom, a C1-6 alkyl group, etc., Y is NR8 or a direct bond (R8 is a hydrogen atom, a C1-6 alkyl group or an aryl group), R9 and R10 are independently a hydrogen atom, a C1-6 alkyl group, etc.,
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