SQUID BIOLUMINESCENCE II. ISOLATION FROM <i>WATASENIA SCINTILLANS</i> AND SYNTHESIS OF 2-(<i>p</i>-HYDROXYBENZYL)-6-(<i>p</i>-HYDROXYPHENYL)-3,7-DIHYDROIMIDAZO[1,2-<i>a</i>]PYRAZIN-3-ONE

Abstract

Abstract 2-(p-Hydroxybenzyl)-6-(p-hydroxyphenyl)-3,7-dihydroimidazo[1,2-a]pyrazin-3-one was isolated from the squid, Watasenia scintillans. Its structure was determined by synthesis. It is considered to be a precursor of hitherto unknown Watasenia luciferin or photoprotein.