Analysis of the Presence of the Betulinic Acid in the Leaves of Eugenia florida by Using the Technique GC/MS,…: A Seasonal and Quantitative Study by Barreto, Alaíde S., Feliciano, Gláucio D., Hastenreiter da Costa Nascimento, Cláudia Cristina 0 Type: Book Analysis of the Presence of the Betulinic Acid in the Leaves of Eugenia florida by Using the Technique GC/MS, GC/FID and HPLC/DAD: A Seasonal and Quantitative Study.