ADS
ATOM  P    O1P  S2P  S3P  O5'  C5'  C4'  O4'  C3'  O3'
ATOM  C2'  O2'  C1'  N9   C8   N7   C5   C6   N6   N1 
ATOM  C2   N3   C4 
CONNECT -  P    O1P +
CONNECT  P    O5'  C5'  C4'  O4'  C1'  C2'  C3'  C4'
CONNECT  C3'  O3'
CONNECT  C2'  O2'
CONNECT  C1'  N9  C8  N7  C5  C6  N6
CONNECT  N9   C4  C5
CONNECT  C6   N1  C2  N3  C4
CONNECT  S2P  S2P
CONNECT  S3P  S3P