H
N   1 nh2     
xx  2 xxn3        1 xxnh3     
B   2 bn4         3 bnxx4         1 dih4   
variables
nh2         0.99521814
bn4         1.29137486
xxn3        1.000000
xxnh3        90.000
bnxx4        90.000
dih4        180.000