Meanwhile, the substances against Gram-positive bacteria were discovered in culture broths of F1-3. After further isolation and purification, compounds F1-3A and F1-3B were obtained from active extracts.

• 在菌株F_(1-3)的发酵液中，检测到有抗革兰阳性菌的物质存在，通过对活性成分的追踪，分离得到化合物F1-3A和F1-3B。