FOR VALUE RECEIVED, Commodore Resources, Inc., a Delaware corporation (“Maker”), promises
to pay to the order of The John Buckman and Jan Hanford Trust (“Payee”), at the address for Payee set forth in
Section 10 or at such address as the holder of this Promissory Note (this “Note”) may designate from time to
time in writing to Maker, the principal amount of FIVE MILLION SIX HUNDRED THOUSAND DOLLARS
1. Interest . Interest on the principal balance hereof shall accrue at the lesser of ten percent (10%)
per annum or the Maximum Lawful Rate (as hereinafter defined). Interest shall be calculated hereunder on the
basis of actual days elapsed and computed as if each calendar year consisted of 365 days.
2. Payment Schedule . Subject to Section 5, Section 6 and Section 7 of this Note, the outstanding
principal balance of this Note and interest thereon shall be paid on May 12, 2007.
3. Prepayment Option . Maker shall have the right to prepay this Note in whole or in part at any
time without penalty or premium. The payments on this Note shall be applied first to accrued but unpaid interest,
if any, and then to principal.
4. Related Agreements . This Note is being entered into in connection with that certain Stock
Purchase Agreement, dated as of May 6, 2005 (the “Purchase Agreement”), by and among Maker, Payee, Lyris
Technologies, Inc., a Delaware corporation (the “Company”), John Buckman, Jan Hanford and J.L. Halsey
Corporation (for certain limited purposes contained therein), pursuant to which, among other things, Maker is
purchasing all of the outstanding capital stock of the Company from Payee. This Note and the Purchase
Agreement are collectively referred to herein as the “Transaction Documents.” Terms having their initial letters