Salt form of harmine and harmaline are harmine and harmaline + added ion from acid (for example harmine and harmaline acetate, or fumarate, etc). Harmol and harmalol are other alkaloids and if they are there, they are only in trace quantities, thats not what you wat.
More concentrated acetic acid is not needed, you could even dilute the 5% vinegar and still work perfectly fine, as harmalas are naturally in salt form in the plant material and therefore water soluble. Just make sure to break/grind everything as fine as possible before extracting.
Where in Brazil are u at, if I may ask?