You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: Toxic gases and vapors (such as nickel carbonyl) may be released ... in the decomp of nickel cmpd. nickel & sol nickel cmpd/ Please write the SMILES representation of it.
user
I[Ni]I
assistant