| http://www.w3.org/ns/prov#value | - Chem., 36, 921 926 (1999), etc.).Process (b):As an alternative process to Process (a), the compound of the present invention of the formula (I) may be prepared by reacting a compound of the formula (XIX):##STR00018## (wherein R.sup.4, R.sup.5, and Ar are as defined above, A is a protecting group for hydroxy group, B is a bromine atom or a iodine atom, and *1 means an asymmetric carbon a
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