I’m just curious. Does that scent somewhat resemble lighter fluid or dry cleaning a bit?
There are several ways to remove caffeine, so I’ve learned. Generally, it can be done with CO2.. However some with evil intentions use solvents like methylene chloride. Benevolent brands use Swiss water processing which is quite harmless. I can attest this process still allows good coffee flavor. I sometimes mix my coffee with (SWP) half decaf. Peet’s Big Bang decaf, to be exact.
For real coffee taste (whole caffeine) variety, I switch over to a yummy Georgia mail order brand called Volcanica Ethiopian Yirgacheffe, medium roast whole bean.