Here's some info on how I am going to prime it this weekend.
The October 2010 Basic Brewing radio was all about alternative priming methods, and the guest (who btw, although he is a minister, from michigan, and is an expert on bottling, is NOT ME, but the coincidence is freaky) offers info on calculating how to prime with strange things.
I figured out the calculation for using Jaggery Mollasses from Bangladesh to prime my Sri-lankin stout.
October 28, 2010 - Alternate Priming Sugars
Home brewer Drew Filkins shares his technique of using alternative ingredients to put the bubbles in his brew.
Click to Listen-Mp3
Hydrometer readings and sugar content charts from HomeWinemaking.com
http://www.home-winemaking.com/winemaking-2b.html
Basically what you need to do is look for the sugar or carbhydrate amount in the syrup and the serving size, they are defining it by.
You also want to first calculate how much corn sugar you would normally use to carb to whatever style you are aiming for, then convert that to grams. Then based on the amount of sugar (OR CARBOHYDRATES if sugars is not listed, which on some products labels they don't) per whatever serving size they give, you then will know how much of the stuff to use..
Ie, my stout I want to carb to 2.45 volumes of co2, which measures out to 4.3 oz of corn sugar at 70 degrees.
That works out to 121.9 grams....
I found online via google, that the Jaggery mollasses contains 12 grams of sugar/tablespoon. So to get to 122 grams I need about 11 tablespoons.
That works our to about 5/8 of a cup. I will add that to enough water to get to 2 cups and boil it.
Listen to the podcast for a better explantaion..
If you CAN'T find any nutritional info (which by law I thought it has to be posted somethwere) you're going to have to fudge it...you can treat it as mollasses, or honey and use the recommended measurment. I have a chart in my bottling thread that shows honey, maple sugar et al.
https://www.homebrewtalk.com/f35/bottling-tips-homebrewer-94812/#post1030376