@<TRIPOS>MOLECULE
SO3_A1500_1TLL
    4     3     0     0     0
SMALL
USER_CHARGES

@<TRIPOS>ATOM
      1 O1         -3.5450  -19.9520  -23.2380 O.3       1 <0>        -0.7862
      2 O2         -1.8020  -18.4340  -23.6790 O.3       1 <0>        -0.7862
      3 O3         -2.9630  -18.2420  -21.5640 O.2       1 <0>        -0.2869
      4 S1         -2.4000  -19.1790  -22.5440 S.o       1 <0>        -0.1407
@<TRIPOS>BOND
     1    1    4 1
     2    2    4 1
     3    3    4 2