Christie Hunter on November 16, 2023 at 9:10 pm Unfortunately there is no ability to enter a minimum in Formula Finder. You can enter this as a feature request on our webpage, I did a search and did not see that request yet! https://sciex.com/support/software-feature-requests One of my colleagues mentioned a trick that they use for PFAS, to force it to focus on adding more Fluorine. Here they reduce the maximum number of Hydrogens and increase Fluorines. Not sure if this will apply to your specific case though. Log in to Reply