Internal coordinates for the gG'a conformer

 H
 O                  1              B1
 C                  2              B2    1              A1
 C                  3              B3    2              A2    1              D1
 O                  4              B4    3              A3    2              D2
 H                  5              B5    4              A4    3              D3
 C                  4              B6    3              A5    2              D4
 H                  3              B7    2              A6    1              D5
 H                  3              B8    2              A7    1              D6
 H                  4              B9    3              A8    2              D7
 H                  7             B10    4              A9    3              D8
 H                  7             B11    4             A10    3              D9
 H                  7             B12    4             A11    3             D10

   B1             0.96550000
   B2             1.41700000
   B3             1.51330000
   B4             1.43510000
   B5             0.96280000
   B6             1.51560000
   B7             1.08910000
   B8             1.09590000
   B9             1.09450000
   B10            1.09040000
   B11            1.09000000
   B12            1.08950000
   A1           105.70000000
   A2           111.80000000
   A3           104.60000000
   A4           108.50000000
   A5           111.90000000
   A6           106.90000000
   A7           111.10000000
   A8           108.40000000
   A9           110.60000000
   A10          110.80000000
   A11          110.00000000
   D1            49.90000000
   D2           -59.60000000
   D3           169.30000000
   D4           179.40000000
   D5           170.20000000
   D6           -71.40000000
   D7            57.10000000
   D8           -62.20000000
   D9           178.10000000
   D10           58.30000000