The common chemical name for aspirin is acetylsalicylic acid. Its systematic name is 2-(acetyloxy) benzoic acid. This is the information according to Wikipedia and does accurately describe the ACTIVE ingredient in a bottle of Bayer aspirin.
load (plural loads) A burden; a weight to be carried. I struggled up the hill with the heavy load in my rucksack. (figuratively) A worry or concern to be endured, especially in the phrase a load off one's mind.
an English unit of weight, chiefly for wool, commonly equal to 28 pounds (12.7 kilograms) but varying locally. 2. a load. 3. a bushy mass, especially of ivy.