#10 What does -InChI2InChI do?

[Andrew Dalke]

When using the code to convert InChI2InChI I found that

InChI=1/CH4C/c1-2/h1H2,2H2

remains as

InChI=1/CH4C/c1-2/h1H2,2H2

when I expected it to be

InChI=1/C2H4/c1-2/h1-2H2

and I found that

InChI=1/CO/c1-2
InChI=1/OC/c1-2

do not produce identical output. Indeed, they stay unchanged.

I thought that the -InChI2InChI would perform a sort of canonicalization of InChI-like strings as input. Now I don't know what it does.