Gleevec produced in Switzerland has the trade name Glivec, so it is abbreviated as G.
NATCO, the third largest pharmaceutical factory in India, also produces imatinib mesylate. They named it Wienert. At present, there is no Chinese translation, and everyone thinks it is the Indian version of Gleevec. So it's called v for short.
In fact, this is very unscientific. Because NATCO is not the largest in India, and calpa, they also produce imatinib mesylate.
In addition, NATCO India also produces another patented drug gefitinib, which is called Geftinat in English. Sometimes abbreviated to g. That's totally different.