13
cyclopentene
C         0.00000000    0.00000000    0.00000000
C         1.52591930    0.00000000    0.00000000
C         1.91379282    1.46320121    0.00000000
C         0.82646804    2.26937230   -0.01273094
C        -0.45721328    1.45720201   -0.03368166
H        -0.38730170   -0.55545472   -0.88951739
H        -0.38590967   -0.51174455    0.91609129
H         1.93434756   -0.49688136    0.91059847
H         1.93436859   -0.49542097   -0.91146601
H         2.96226915    1.76183254    0.01195967
H         0.80227133    3.35861304   -0.01390750
H        -1.08129668    1.71718634    0.85296968
H        -1.02506292    1.68671868   -0.96602782