prov:value
| - be substituted with (R.sup.16).sub.q, Z is an oxygen atom, B is an oxygen atom, a CO.sub.2 group or aCONH group, R.sup.5, R.sup.6 and R.sup.7 independently represent a hydrogen atom, i is 2 to 4, r is 0, X is a chlorine atom or a bromine atom, and R.sup.2 and R.sup.3 do not simultaneously represent a hydrogen atom.Among the preferred compounds, R.sup.16 is more preferably a halogen atom, a C.sub.
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