Corollary 1
Tag 0ACM, permanent. Cite it as [Bourbaki, Tag 0ACM].
Lie Groups and Lie Algebras, chapter III, § 4. Passage from Lie algebras to Lie groups
Let and be two Lie group germs. If and are isomorphic, and are locally isomorphic.
This follows from Theorem 1 and § 1, no. 10, Proposition 21.
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.