... Il Farmaco. Volume 57, Issue 2, February 2002, Pages 109–116. Cover image Cover image. Synthesis of variously 9,9-dialkylated octahydropyrimido [3,4-a]-s-triazines with potential antifungal activity. ... Reactants, 3, 4, R 1, R 2, R 3, R 4, R 5. 1a+2a, a, Bu, Bu, H, H, H. 1a+2b, b, Bu ...