After the flower has been heated THCA converts to THC. THC is the primary psychoactive substance found in the cannabis flower after decarboxylation. It is responsible for the high you feel. Hundreds of studies have, and continue to be done on this compound
After the flower has been heated CBDA converts to CBD. CBD is not psychoactive like THC and is nonintoxicating. CBD has, and will continue to be studied for its wide range of therapeutic value. CBD in combination with THC can be beneficial due to a process called the "entorage effect"
After the flower has been heated CBCA converts to CBC. This compound has not been studied much but probably holds equal medicinal value to that of its fellow compounds THC and CBD. As prohibition ends more people will be able to study this plant.
After the flower is heated THCVA converts to THCV. This compound is under investigation to help with a number of issues including diabetes and weight loss. THCV is said to be shorter acting than THC and have different effects.
After the flower is heated CBDVA is converted to CBDV. Like its pently buddy CBD, CBDV seems to share many of the same medicinal properties as its counterpart and is used in combination as a potent anticonvolsant