At a pristine, multimillion-dollar lab on the Manhattan waterfront, just down the street from a men’s homeless shelter and the medical examiner’s office, a slice of summer plum is being converted into fragrance code. This is the work of Osmo, a fragrance tech startup claiming to build artificial olfactory intelligence. Osmo has parlayed this innovation into offering turnkey fragrance compounding that promises a 48-hour sample turnaround from initial client prompt. In the time it takes…