(R)-(+)-Leptophos (R)-Phenylphosphonothioic acid O-(4-bromo-2,5-dichlorophenyl) O-methyl ester 73307-66-1 BRN 2152663 Phosphonothioic acid, phenyl-, O-(4-bromo-2,5-dichlorophenyl) O-methyl ester, (R)-