Alias

Checker searches for aliases in the structure.
Fixers:
- converting alias to abbreviated group if the alias value corresponds to a group in the abbreviated group list * (aliastogroup);
- converting alias to atom if the alias value corresponds to an element (e.g., Ar) (aliastoatom);
- removing alias (revealing the atom under the alias) ** (removealias);
- deleting the atom having alias information (removeatom).

Example :

Alias Checker (`alias`)	Warning:	Fix
		Convert Alias to Group (`aliastogroup`)	Convert to Atom (`aliastoatom`)	Remove Alias (`removealias`)	Delete Atom (`removeatom`)
Detect Alias	ex_alias_ch	convert ot group	convert to atom	ex_alias_frem	ex_alias_fdel

"OMe" and "CL" were defined as alias. After converting "OMe" to methoxy group, the abbreviated group is linked correctly to the chain, i.e., bond through the oxygen atom.

^* User defined abbreviated groups are also available to be applied as recognizable abbreviated group set.
^** Alias only covers the atom, and fixer removes this alias from the original atom.