Sulfoalkyl benzoxazoleinylidene butenylidene thiobarbituric acid derivatives

Abstract

A merocyanine dye having the formula: ##STR1## wherein: R.sub.1 and R.sub.2 independently are H, alkyl, alkoxy or aryl; R.sub.7 and R.sub.8 are H or any of R.sub.1 and R.sub.2, R.sub.1 and R.sub.7, and R.sub.2 and R.sub.8 can together comprise the atoms necessary to form a fused aromatic ring on the benzene radical to which they are attached and with the stipulation that only one of R.sub.1 and R.sub.2 can be H; R.sub.5 and R.sub.6 comprise alkyl of from 1-18 carbon atoms, provided that the sum of the carbon atoms in R.sub.5 and R.sub.6 together is at least 8; R.sub.9 is an alkylene group of 2-9 nuclear carbon and hetero atoms; and Z.sup.+ is a cation. This dye is useful in a method for inactivating viruses comprising contacting the viruses with the compound and exposing the resulting mixture to visible light to excite and inactivate the viruses. The compounds are also useful in the irradiation-induced inactivation of leukemia cells.

Dependencies are inferred from the claim text.