Oblon, Spivak, McClelland, Maier & Neustadt
Methine dyes and optical recording medium containing same
 Methine dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, X, Y and the rings A and B each have specific meanings, and methine dyes obtainable by reacting an organic mono- or polyisocyanate with such a methine dye of the abovementioned formal where only the radicals R.sup.1 and/and R.sup.4 have a group reacting with an organic mono- or polyisocyanate are useful in optical recording media. 
BASF Aktiengesellschaft
G Y G G G G Y G C G G
G11B Y10S G11B G11B G11B G11B Y10S G11B C09B G11B G11B
additional additional additional additional additional additional additional additional inventional additional inventional
Mathias Michael Peter Klaus D. Sibylle Harald
Dust Acker Neumann Schomann Brosius Kuppelmaier