Common use of EXHIBIT LIST Clause in Contracts

EXHIBIT LIST. The exhibits attached to this Lease are listed below. All exhibits are a part of this Lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Leased Premises (paragraph 1.1) Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Exhibit E Construction by Lessor or Lessee (Paragraph 5.1) Exhibit F-1 Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Exhibit I Corporate Resolution Authorizing Lease or Guaranty Exhibit J Special Conditions (paragraph 39.1) Exhibit K Acknowledgement of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009

EXHIBIT LIST. The exhibits attached to this Lease lease are listed below. All exhibits are a part of this Lease lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Leased Premises Tenant's Office Space (paragraph 1.1) Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru through Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Acknowledgment of Lease (paragraph 4.2) Exhibit E Construction by Lessor or Lessee Landlord (Paragraph paragraph 5.1) Exhibit F-1 Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Lease Guaranty (paragraph 37.1) Exhibit I Corporate Resolution Authorizing Lease or Guaranty (paragraphs 37.1 and 39.1) Exhibit J Special Conditions (paragraph 39.137.2) Exhibit K Acknowledgement of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009Rough-Sketch Drawing (paragraph 5.1)

EXHIBIT LIST. The exhibits attached to this Lease lease are listed below. All exhibits are a part of this Lease lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Leased Premises Lessee’s Office Space (paragraph 1.1) Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru Passthrough Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Acknowledgment of Lease (paragraph 4.2) Exhibit E Construction by Lessor or Lessee (Paragraph paragraph 5.1) Exhibit E-1 Space Plan Exhibit F-1 Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Lease Guaranty (paragraph 37.1) Exhibit I Corporate Resolution Authorizing Lease or Guaranty (paragraphs 37.1 and 39.1) Exhibit J Special Conditions (paragraph 39.137.2) Exhibit K Acknowledgement Hazardous Materials Statement Exhibit L Acknowledgment of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009Disclosure

EXHIBIT LIST. The exhibits attached to this Lease lease are listed below. All exhibits are a part of this Lease lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Leased Premises Lessee's Office Space (paragraph 1.1) Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru Passthrough Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Acknowledgment of Lease (paragraph 4.2) Exhibit E Construction by Lessor or Lessee (Paragraph paragraph 5.1) Exhibit F-1 Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Exhibit I Corporate Resolution Authorizing Lease or Guaranty (paragraphs 39.1) Exhibit J I Special Conditions (paragraph 39.137.1) Exhibit J Hazardous Materials Statement Exhibit K Acknowledgement of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009Confidentiality Agreement Exhibit L Mortgagee Non-Disturbance Agreement

EXHIBIT LIST. The exhibits attached to this Lease lease are listed below. All exhibits are a part of this Lease lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Leased Premises Lessee's Office Space (paragraph 1.1) Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru Passthrough Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Acknowledgment of Lease (paragraph 4.2) Exhibit E Construction by Lessor or Lessee (Paragraph paragraph 5.1) Exhibit F-1 Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Lease Guaranty (paragraph 37.1) Exhibit I Corporate Resolution Authorizing Lease or Guaranty (paragraphs 37.1 and 39.1) Exhibit J Special Conditions (paragraph 39.137.2) Exhibit K Acknowledgement Hazardous Materials Statement Exhibit L Acknowledgment of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009Disclosure

EXHIBIT LIST. The exhibits attached to this Lease lease are listed below. All exhibits are a part of this Lease lease except for those which have been lined out or which have been shown below as omitted. Exhibit A Floor Plan of the Lessee’s Leased Premises (paragraph 1.1) Exhibit A-l Parking Garage Plan Exhibit B Legal Description of Office Building (paragraph 1.1) Exhibit C Building Operating Expense Pass-Thru Passthrough Calculations (paragraphs 2.1 and 32.1) Exhibit D Commencement Agreement Acknowledgment of Lease (paragraph 4.2) Exhibit E Construction by Lessor or Lessee (Paragraph paragraph 5.1) Exhibit F-1 F-l Parking Rules (paragraphs 9.2 and 23.1) Exhibit F-2 Building Rules (paragraph 23.1) Exhibit G Estoppel Certificate (paragraph 30.1) Exhibit H Intentionally Deleted Exhibit I Corporate Resolution Authorizing Lease or Guaranty Exhibit J Special Conditions (paragraph 39.137.2) Exhibit K Acknowledgement Hazardous Materials Statement Exhibit L Acknowledgment of Receipt of Agency Disclosure Building Name: StoneCliff Lessee Lessee’s Name: Pain Therapeutics, Inc. Lessor Rev: 03/2009Disclosure