1     7  Propyne
2     1  C     -0.105976    0.008208   -0.447260     1     2     4     5     6
3     2  C      0.347937   -0.127445    0.945521     4     1     3
4     3  C      0.721609   -0.240115    2.092184     4     2     7
5     4  H     -1.053119    0.589320   -0.483340     5     1
6     5  H     -0.281826   -0.996703   -0.889193     5     1
7     6  H      0.665298    0.537138   -1.048461     5     1
8     7  H      1.055237   -0.339809    3.115884   124     3
9