| methyl-phosphonothioic aci o-methyl o-(4-nitro-m-tolyl) ester |
| o-(3-methyl-4-nitrophenyl) o-methyl methylphosphonothioate |
| methyl-phosphonothioic aci o-methyl o-(3-methyl-4-nitrophenyl) ester |
| methyl-phosphonothioic aci o-methylo-(4-nitro-m-tolyl) ester |
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