 Nyora kupfuurira kweiyi ndima - Seimwe nzira, 1-naphthol inogona kurapwa ne phosgene yakawandisa kugadzira 1-naphthylchloroformate, iyo inobva yashandurwa kuita carbaryl nekupindirana nemethylamine. Nzira yokutanga yakaitwa muBhopal. Mukuenzanisa, synthesis yokupedzisira inoshandisa chaizvoizvo reagents imwe cheteyo, asi mumutsara wakasiana. Iyi nzira inodzivisa ngozi dzinobvira dzemethyl isocyanate. 