The lawsuit also would name Solutia Inc. and Pharmacia LLC as defendants. Those companies were formed out of what were Monsanto’s chemical and pharmaceutical divisions until about two decades ago. A spokeswoman for Eastman Chemical Co., which owns Solutia, referred questions to Monsanto. A spokeswoman for Pfizer, which owns Pharmacia, said the separation agreement reached between Monsanto and Pharmacia requires Monsanto to indemnify Pharmacia for any liabilities related to the company’s agricultural or chemical product businesses.