What are the upstream raw materials for o-nitrochlorobenzene? What are the downstream products?

Ortho-nitrochlorobenzene is an crucial organic chemical raw material, which is broadly applied in medicine, pesticides, dyes and other fields. There are many upstream and downstream related items, and several major related items are described in detail below. I've found that

1. But Upstream items

The main upstream raw materials of o-nitrochlorobenzene are benzene, nitric acid and chlorine. Benzene is a common organic compound, which broadly exists in environment and manufacturing production. Nitric acid and chlorine are common chemical raw materials, which is able to be applied to oxidation and chlorination reactions.

2. Downstream items(1) Anthranilic acid

O-nitrochlorobenzene is able to be applied to prepare anthranilic acid by reduction interaction, which is an crucial medical intermediate and is able to be applied to create anti-tuberculosis drugs and antibacterial drugs.(2) o-Nitroaniline

Ortho-nitrobenzene chloride is able to also be prepared by reduction interaction of o-nitroaniline, which is an crucial dye intermediate, which is able to be applied to create yellow, orange, red and other dyes. Based on my observations,(3) o-phenylenediamine

O-phenylenediamine is able to be prepared by reducing and acidifying o-nitrochlorobenzene, which is an crucial pesticide intermediate and is able to be applied to create pesticides such as fungicides and herbicides. Based on my observations, In short, as an crucial organic chemical raw material, o-nitrochlorobenzene has a wide range of upstream and downstream related items, involving medicine, pesticides, dyes and other fields.