| 摘要 |
<p>Compounds of formula (I): < IMG > (I) whereln R1 is hydrogen or C1-6 alkyl, and each phenyl group is optionally substituted by one or two inert substituents selected from C1-3 alkyl, C1-3 alkoxy and halogen; are useful intermediates for the preparation of compounds for the treatment of diseases the symptoms of which are controlled by the mediators of the allergic response.</p> |
