▁under ▁the ▁treat y . ▁ ▁In ▁ 2 0 1 3 ▁Ah met ▁U z um cu , ▁the ▁Director - General ▁of ▁the ▁OP C W , ▁ha iled ▁Iran ▁as ▁an ▁effective ▁and ▁active ▁member - state ▁of ▁the ▁OP C W . ▁In ▁ 2 0 1 6 ▁Iran ian ▁chem ists ▁synth es ised ▁five ▁Nov ich ok ▁n erve ▁agents , ▁originally ▁developed ▁in ▁the ▁Soviet ▁Union , ▁for ▁analysis ▁and ▁produced ▁detailed ▁mass ▁spectral ▁data ▁which ▁was ▁added ▁to ▁the ▁OP C W ▁Central ▁Anal yt ical ▁Database . ▁Pre viously ▁there ▁had ▁been ▁no ▁detailed ▁descri ptions ▁of ▁their ▁spectral ▁properties ▁in ▁open ▁scientific ▁literature . ▁ ▁D elivery ▁systems ▁ ▁Miss iles ▁ ▁A ▁Shah ab - 4 ▁with ▁a ▁range ▁of ▁ 2 , 0 0 0   km ▁and ▁a ▁payload ▁of ▁ 1 , 0 0 0   kg ▁is ▁believed ▁to ▁be ▁under ▁development . ▁Iran ▁has ▁stated ▁the ▁Shah ab - 3 ▁is ▁the ▁last ▁of ▁its ▁war ▁miss iles ▁and ▁the ▁Shah ab - 4 ▁is ▁being ▁developed ▁to ▁give ▁the ▁country ▁the ▁cap ability ▁of ▁launch ing ▁communic ations ▁and ▁surve ill ance ▁sat ell ites . ▁A ▁Shah ab - 5 , ▁an ▁inter cont inental ▁ball istic ▁miss ile ▁with ▁a ▁ 1 0 , 0 0 0   km ▁range , ▁has ▁been ▁alleg ed ▁but ▁not ▁proven ▁to ▁be ▁under ▁development . ▁ ▁In ▁ 2 0 1 7 , ▁Iran ▁tested ▁the