Verilog Netlist format with "\"
The verilog escaping mechanism is to put \ at the start of an identifier and a " " at the end. The trailing space is mandatory. Within those, anything is a legal verilog name. It's pretty ugly.

It looks like the compiler has "flattened" part of the design, what might have been inv.qmul.p has become one identifier and the module hierarchy has gone.