No, it isn't correct.
This is the opcode, it is different for every single line. You can look it up by pressing CTRL+ALT+2 in SannyBuilder. You will find the following line:
I don't think that is what you wanted.
This is also an opcode, I suppose, because else I don't know what you mean by this part of your code. When you look again at the opcode search tool, this opcode is the following:
| 020C: create_explosion_with_radius 0 at (coords x,y,z) |
I think you meant this opcode, I will explain.
The first part, 020C, is the opcode. That is for every opcode different. In this case 020C.
create_explosion_with_radius doesn't mean anything. You can change it into everything you want. It is only for the coder, so that he knows what an opcode mean.
The 0 is something that you can change. 0 means a small explosion, 1 means a bit bigger explosion.
Then after at you have to fill in the coords (x, y, z). You can find it by pressing CTRL+ALT+1 in SannyBuilder.