Borris..if I am wrong, fair enough and I am not saying I'm correct.
I assumed - 18 notes = 25M options and 25M shares each because you did not state how many.
5 at 100M shares and 100M options each
22 at 25M shares and 25M options each
Also how far away is the max. expiry date in months?
BOrris.. also remember I think ESN are a reasonable bet