Abstract: The invention relates to the field of crop selection and crop breeding, particularly to selection methods for breeding colony varieties of crops involving self-pollination and normal cross-pollination. Selection methods include crossing male parents with female parents to obtain crop populations, wherein the female parents are individual plants in a segregation population or self-crossed descendants of early segregation generations, said segregation population obtained by hybridizing pairs of parental plants with different desired characteristics to produce population F1, and then hybridizing pairs of F1 one more time. The male parents are homozygous breeding lines, varieties, F1, heterozygous plants in the segregation generations or individual plants produced in the same manner as for the female group.

Abstract: The aryl pyrimidine derivatives and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, including utility as selective 5HT.sub.2B -antagonists. The 5-HT.sub.2B antagonist is a compound of the formula: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, lower alkoxy, hydroxyalkyl, cycloalkyl, cycloalkyl lower alkyl, alkenyl, lower thioalkoxy, halo, fluoroalkyl, --NR.sup.6 R.sup.7, --CO.sub.2 R.sup.8, --O(CH.sub.2).sub.n R.sup.9, or lower alkyl optionally substituted with hydroxy, alkoxy, halo, or aryl; in whichn is 1, 2, or 3;R.sup.6 and R.sup.7 are hydrogen or lower alkyl;R.sup.8 is hydrogen or lower alkyl; andR.sup.9 is hydrogen, lower alkyl, hydroxy, hydroxy lower alkyl, lower alkenyl, or lower alkoxy;R.sup.2 is hydrogen, lower alkyl, lower alkoxy, halo, or lower fluoroalkyl;R.sup.3 is optionally substituted aryl other than pyridyl, thienyl, or furanyl;R.sup.4 is hydrogen, lower alkyl, cycloalkyl, alkenyl, acyl, amino, amido, aryl, --(CH.sub.2).sub.m NR.sup.10 R.sup.

Abstract: The aryl pyrimidine derivatives and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, including utility as selective 5HT.sub.2B -antagonists.

Abstract: The disclosed pyrimidine derivatives, and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, in particular use as selective 5HT.sub.2B -antagonists. The invention is also directed to formulations and methods for treatment.