[gmx-users] pdb file error

[hhhh huan]

hi GMX users,

i am facing some problems to obtain the proper pdb
file OF CCCCCCCCC=CCCCCOC=OCCCCCCCC=CCC=CCCCC from
DUNNDEE PRO DRG server...
the correct pdb file should be .....COOC...
it is a ester group but the pdb i obtained was
..CCCOCOCC...
i tried to subtitude both acid part double bond to
single bond.., i managed to get the
...COOC...arragement in pdb file..
so i wonder there is any other way to obtain the pdb
file which can be used in GROMACS o other solution to
settle this?

thanks for any helps n comments.