Please help me to find IC Number

I am having one ozone generator circuit which generates almost 8KV for repair, which is using one 8 pin IC ( number is removed) which is having VCC connected to pin no.8, Gnd connected to pin no.4, pin no.5 & Pinno.7 are connected to IRF840 and IRF 840 is connected to coil which secondary produces high voltage.

Sounds like some kind of oscillator, can you attach a high quality of the chip in the circuit so we can see what's around it?