Compounds of the formula ##STR1## where X is O or S; R.sub.1 is lower alkyl having 1 to 6 carbons; R.sub.2 is H, lower alkyl having 1 to 6 carbons; or OR.sub.2.sup.* where R.sub.2.sup.* is lower alkyl having 1 to 6 carbons; Y is O, S or NH; and R.sub.3 is H, lower alkyl having 1 to six carbons, or C(O)R.sub.3.sup.* where R.sub.3.sup.* is lower alkyl having 1 to 5 carbons, with the proviso that the YR.sub.3 group is not disposed in the ortho position on the benzene nucleus relative to the 2-amino group of the oxazoline or thiazoline heterocycle, are active in maintaining or reducing intraocular pressure in the mammalian eye, and are active as vasoconstrictors and capable of reducing or controlling intraocular bleeding of the mammalian eye.
化合物的公式为##STR1##其中X为O或S; R.sub.1是具有1至6个碳的低烷基; R.sub.2是H,具有1至6个碳的低烷基; 或OR.sub.2.sup.*其中R.sub.2.sup.*是具有1至6个碳的低烷基; Y为O,S或NH; R.sub.3为H,具有1至六个碳的低烷基,或C(O)R.sub.3.sup.*其中R.sub.3.sup.*是具有1至5个碳的低烷基,但YR.sub.3基团不得相对于
噁唑啉或
噻唑啉杂环的2-
氨基位于苯环核的邻位,这些化合物在维持或降低哺乳动物眼内压方面具有活性,并且在缩血管和减少或控制哺乳动物眼内出血方面具有活性。