Abstract: A laser scanning microscope with raster-type illumination at different wavelengths comprises laser radiation which is coupled in by light-conducting fibers, wherein the coupling in of the illumination is carried out by at least one dichroic beam splitter which reflects in at least one wavelength range and transmits in at least a second wavelength range.

Abstract: The invention relates to novel pyridyl derivatives, their use as medicaments, pharmaceutical formulations including them and methods for their preparation.

Abstract: Compounds of the formula (I) wherein X, R.sup.1, R.sup.2, and Ar.sup.1 as defined in the specification. The compounds are useful medicaments, particularly in the treatment of asthma or rhinitis.

Abstract: A compound of formula I, ##STR1## wherein--X represents (CH.sub.2).sub.n O, (CH.sub.2).sub.n S or C.sub.2 alkylene;n represents 1 or 2;Ar.sup.1 represents indanyl, tetrahydronaphthyl, naphthyl or phenyl, which latter two groups may be substituted by one or more substituents selected from chloro, fluoro, OR.sup.1, O(CH.sub.2).sub.m CONR.sup.20 R.sup.21, C(O)R.sup.2, C.sub.1-6 alkyl (optionally substituted by one or more fluorine atoms), pyridyl, thiazinyl, phenyl or C.sub.7-9 alkylphenyl which latter two groups are optionally substituted by one or more substituent selected from halo, nitro, OR.sup.3, C.sub.1-6 alkyl (optionally substituted by one or more fluorine atoms), C(O)R.sup.4, C(O)OR.sup.5, C(O)N(R.sup.6)R.sup.7, CN, CH.sub.2 OR.sup.14, CH.sub.2 NR.sup.15 R.sup.16, N(R.sup.8)R.sup.9, N(R.sup.10)SO.sub.2 R.sup.11, N(R.sup.12)C(O)R.sup.13, OC(O)R.sup.19 and SO.sub.2 NR.sup.17 R.sup.18 ;m represents an integer 1 to 3;R.sup.1, R.sup.2 and R.sup.3 independently represent H, C.sub.