C 
C 1 1.535
H 1 1.094 2 109.5
H 1 1.094 2 109.5 3  120
H 1 1.094 2 109.5 3 -120
H 2 1.094 1 109.5 3 -60
H 2 1.094 1 109.5 3  180
H 2 1.094 1 109.5 3  60