Help finding Sulfur (spoilers)

[Janakev]

I understand this has to be poured in, in some proper order. is there some sequence with those 6 buttons? I must be getting close to the end, right?

The note detailing how to make the antidote gives the sequence for the buttons. Remember, though, that the top left is 1 and the bottom right starts at 4 (as detailed in the note).
If you're still stuck just let me know.

EDIT: Just taken a screencap and put in some numbers to show the sequence, it's easier than trying to explain.

Spoiler below!