definiens: shall mean any information of the disclosing party or any Affiliate thereof, which gives the disclosing party an advantage over its competitors who do not possess such information and constitutes valuable trade secrets and proprietary data which was revealed to the receiving party as a result of entering into or performing its obligations under this Agreement, including but not limited to, information which relates to the Cornerstone Product, the Program, Target Physicians, designs, methods, discoveries, improvements, documents, trade secrets, proprietary rights, business affairs, customer information or employee information . Confidential Information shall not include any information that : 11 CONFIDENTIAL TREATMENT REQUESTED ( a ) was known to the receiving party prior to the date of this Agreement, without an obligation to keep it confidential ; ( b ) was lawfully obtained by the receiving party from a third party without any obligation of confidentiality ; ( c ) is, at the time of disclosure, in this public knowledge ; ( d ) becomes part of the public knowledge after disclosure by publication or otherwise except by breach of this Agreement ; ( e ) is developed by the receiving party independently by persons who did not have access to the Confidential information and apart from this Agreement