16

 C        -0.174912346599      0.155983216318     -0.007217503533
 S         0.873112536237      0.397700792965      1.320130526967
 S         0.404462372073      0.006057359257     -1.620989853748
 C         0.104873588634      1.768517286188      2.242247289917
 C         1.080835956397      1.637908033135     -2.018218321618
 O        -0.799565507568     -0.197810062441     -2.468408607402
 O         1.526297284038     -0.933909850038     -1.848307209471
 O         0.869772428309     -0.716545574623      2.300138766492
 O         2.179955686160      0.937144972995      0.864817516633
 H        -1.000128104978     -0.515659883631      0.188838491364
 H         1.491115939376      1.568699615436     -3.025958402992
 H         0.269180254806      2.361457748028     -1.968313977898
 H         1.858566497681      1.850232823194     -1.286298659401
 H         0.085097044526      2.643081665393      1.594821524823
 H        -0.905230832471      1.470576078586      2.521392799788
 H         0.714989563378      1.944280999239      3.129668500077