N-Methylquinolinium 2-carboxylate, a Defensive Betaine fromPhoturis versicolorFireflies

<i>N</i>-Methylquinolinium 2-carboxylate, a Defensive Betaine from<i>Photuris versicolor</i>Fireflies Identification and seasonal quantification of defensive secretion components ofOreina gloriosa (Coleoptera: Chrysomelidae) Fluorescierende Stoffe aus Roten Waldameisen der Gattung <i>Formica (Ins. Hym.)</i>. 1. Mitteilung. Isolierung von Riboflavin, 2‐Amino‐6‐hydroxy‐pteridin, Isoxanthopterin, Biopterin und einer neuen, als «Formicapterin» bezeichneten Substanz Hyperaspine, a new 3-oxaquinolizidine alkaloid from Hyperaspis campestris (Coleoptera: Coccinellidae) Identification of pteridines in the firebug, Pyrrhocoris apterus (L.) (Heteroptera, Pyrrhocoridae) by high -performance liquid chromatography Photoaktive Stoffe aus Männchen von Formica polyctena Foerst. (Ins. Hym. Form.) Identification of a Naturally Occurring Quinazolin-4(3H)-one Firefly Luciferase Inhibitor N-Methyl-β-carbolinium Salts and an N-Methylated 8-Oxoisoguanine as Acetylcholinesterase Inhibitors from a Solitary Ascidian, Cnemidocarpa irene Betulinans A and B, Two Benzoquinone Compounds from <i>Lenzites betulina</i> Identification of a Naturally Occurring Quinazolin-4(3<i>H</i>)-one Firefly Luciferase Inhibitor