1. The plant Haplophyllum acutifolium has yielded eudesmine, acetamide, skimmianine, and a new base with the composition C16H19NO, mp 122-123°C, which has been called acutine. 2. It has been shown that acutine has the structure of 2-(hept-4-enyl)-1,4-dihydroquinolin-4-one. © 1975 Plenum Publishing Corporation.