Crzydiamond is right, you have the tamper-proof formulation.
Luckily, someone made generics after they made the TRF. I think Global Pharmaceuticals makes them, I know they have a "G" and then two numbers (I think the 40's say G74, I know they are orange).
If you managed to bust up the TRF pill that you have, you can always give it a try. But be warned, it's going to gel up and it will be hard to get down your nostril. You almost have to make sure your nostril is completely dry and even then, it's tough.
For the sake of doing the pill, I would just take it. I remember when I had a heavy opana habit (Two 40's a day) and the TRF's came out. I managed to get about 4 40's, ate them, and the buzz was mild (Don't do this at home, I had a heavy Opana tolerance). So, I quit doing them until the generics came out.
If you run into the Endo Opana's again, I would pass up on it and get something that you can at least use if you are wanting to catch a buzz. Remember, Opana is an extremely potent opiate and many OD's have occurred. Always exercise caution with Oxymorphone.