Prompt C was more complex, in that the molecular formula was not provided. The Organic Chemistry model misattributed chlorine atoms to the EI MS, with less accurate IR and 1H assignments than GPT-5 and ChatGPT-4o for a score of 2/5. 3.5 Sonnet identified some useful m/z fragments, but its compound molecular weight was low, for a score of 3/5. Gemini 1.5 Pro returned only a general description for a type of molecule it could be for a score of 1/5. Mestrelab and ACD/Labs have been shown to yield answers for many organic compounds, however the insight gained from this study is productive for understanding AI analysis for many steps. Also, when assistance was needed to further assist structural elucidations, a single spectrum upload was found to be effective with GPT-5, such as identifying Prompt C's CH2 proton splitting pattern next to each ester substituent.