\altaffiliation
Asharedfootnote\altaffiliationCurrentaddress:Someotherplace,Othertöwn,Germany\altaffiliationAsharedfootnoteDepartmentofChemistry,SecondUniversity,NearbyTownDepartmentofChemistry,SecondUniversity,NearbyTownAdemonstrationoftheachemsoLaTeX class11Afootnoteforthetitle\keywordsAmericanChemicalSociety,LaTeX The example file also loads the optional mhchem package, so that formulas are easy to input: \ce{H2SO4} gives \ceH2SO4. See the use in the bibliography file (when using titles in the references section).
The use of new commands should be limited to simple things which will not interfere with the production process. For example, \mycommand has been defined in this example, to give italic, mono-spaced text: some text.