Oblon, Spivak, McClelland, Maier & Neustadt
Quinoxalinepentamethine dyes and optical recording medium containing same
 Quinoxalinepentamethine dyes of the formula ##STR1## where R.sup.1 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.22 -alkyl or substituted or unsubstituted C.sub.5 -C.sub.7 -cycloalkyl, PA0 R.sup.2 is hydrogen, chlorine, bromine or C.sub.1 -C.sub.6 -alkyl, PA0 Y is a radical of the formula --N.dbd.C(CH.sub.3)-- or --N(R.sup.1)--CO--, where R.sup.1 is as defined above, PA0 Z.sup.1 and Z.sup.2 are each hydrogen or together are unsubstituted or substituted C.sub.2 -C.sub.3 -alkylene, PA0 X.sup..crclbar. is an anion and the rings A and B independently of each other may be substituted and/or benzofused and are useful in optical recording media. 
BASF Aktiengesellschaft
G G Y G Y Y G C C C G Y Y Y
G11B G11B Y10T G11B Y10T Y10T G11B C09B C09B C09B G11B Y10S Y10S Y10T
inventional additional additional additional additional additional additional inventional inventional inventional additional additional additional additional
Michael Peter Klaus D. Sibylle Bernhard Harald
Acker Neumann Schomann Brosius Albert Kuppelmaier