SYNTHESIS OF A NAPHTHOTETRAZINE 
535 
ester and two of dicyandiamide, yielding a substance of the fol- 
lowing structural formula : 
N 
II 
NCHN-C 
0 H H 
/C \ h/ v"\. 
NHCN 
I I 
II 
n m ^\ c ^S\ c x m 
H H o 
Figure 100 
The product is therefore 2, 7 — dicyanamino — 4, 9 — diketotetra- 
hydro — 1, 3, 6, 8 — naphthotetrazine. 
Chemistry Section, 
State College. 
