This phenyl ring is substituted at R3 which has a hydroxy group (OH-). An additional hydroxy team is identified at the identical place the cyclohexane ring is bonded to within the phenyl ring, R1. O-DMST contains a third substitution on its cyclohexane ring at R2. Below the ring is bonded https://dutchcompounds.com/product/o-dsmt-pellets-30mg/