Operation re-naming under onnx exporting

hi guys,
I converted my pytorch model into onnx, and then converted it to SNPE(qualcomm runtime SDK), but met a serious problem:
Mul_281 is not supported in SNPE,
I opened the onnx model with neutron, yes, there is a Mul_281 node indeed, but, I don’t know which operation in my pytorch model responsible for this Mul_281 operation, I guess this Mul_281 is a matrix multiplication in my pytorch model, but renamed during pytorch—>onnx conversion,
My questions is: how could I locate the corresponding operation for Mul_281 in my pytorch model? could I debug inside pytorch-onnx exporting? thank you.