Check what kind of carbohydrates are listed on the side of the package. While some sources of carbohydrate are faster acting than others all produce a reaction that effects the blood sugar level of a person. A non diabetic's body self regulates. An insulin dependent diabetic needs to inject an appropriate amount of insulin to counter the blood sugar spike the carbs produce. Each person is a bit different but with experience it is possible to determine how many points the blood sugar will raise for a gram of carbohydrate and how many units of insulin are required to counteract a gram of carbohydrate (or lower blood sugar by a desired amount)
That said sugar from fruit still requires insulin to counteract. A 3in apple for example has about 21 grams of carbohydrate and must be countered by an insulin dependent. Unless that fructose glucose syrup is really some sort of weird sugarfree no carb sweetener its still going to have an effect on your system.
note: this is from the experience of someone who grew up with a diabetic father. My father was diagnosed with diabetes at age 8 and is still around and kicking at 56. I've watched him manage the disease all my life.