A Tripos Mol2 file (.mol2) is a complete, portable representation of a SYBYL molecule. It is an ASCII file which contains all the information needed to reconstruct a SYBYL molecule. Mol2 files are written out in a free format to avoid the restrictions created by fixed format files. Download the Mol2 File Format documentation to get detailed information so you that may write your own programs to read and write Mol2 files.