ChemAxon products are is able to import and export Base64 encoded files (RFC 1341).
A binary file is encoded as a multi line ASCII file containing the characters: a-z, A-Z, 0-9, + and /.
A line contains no more than 76 characters. 3 input bytes are encoded in the form of 4 ASCII characters. At the end of the file, there might be one or two = characters, for padding.
At export, the molecule file format is specified as an export option.
Exports a base64 encoded gzipped SD file.