<s>[INST] ### Context
I have a substance that I'm trying to identify the chemical structure of, but I don't have any information about its molecular formula. I have run some experiments and have come up with the following data:
- When I run it through a GC-MS, I get a parent peak at 246.12 m/z with two daughter peaks at 200.10 m/z and 217.12 m/z. The relative abundances of the 200.10 m/z and 217.12 m/z peaks are roughly 1:1.
- The substance is soluble in DCM and insoluble in water.
- When I run an NMR, I see a group of 6 singlets in the aromatic region between 7.1-7.5 ppm.
- The substance is a solid at room temperature.

### Problem
How would you go about identifying the chemical structure of this substance?[/INST]