1222 DAVID D. NYBERG AND BERT E. CHRISTENSEN Vol. 79 the procedure of Weinstock and Boekelheide= did not lead to any recognizable products except for a small amount (ca. 570) of recovered tetraphyllicine. Selenium Dehydrogenation of Tetra hyllicine.-An intimate mixture of 300 mg. each of tetr&hyllicine and black selenium was heated at 300" for 5 minutes, cooled, mixed with sand and extracted continuously for 18 hours in a Soxhlet ...