How to: Transposing/concatenating problem.

Can't wrap my head around the following reformatting problem. My data looks like this:

Pointid substance1 substance2 substance3...

1 value

2

3

I have a lot of columns in the original data, almost 200 different substances. I would like to achieve the following structure (below) where Substances attribute contains all values of 200 substance columns and is exploded for each Pointid. So basically every Pointid is replicated for each substance and values column have the value of each substance. I've tried multiple combinations of transformers but without result.

Pointid Substances values

1 Substance1 value

1 Substance2 ...

1 Substance3

2 Substance1

2 Substance2

...