摘要:
O-4,O-9-Dimethylstealthin A (11-amino-5-hydroxy-2-hydroxymethyl-4,9-dimethoxy-benzo[b]fluoren-10-one) and O-4,O-9-dimethylstealthin C (11-amino-5-hydroxy-4,9-dimethoxy-2-methyl-benzo[b]fluoren-10-one), methylated derivatives of radical scavengers produced by Stereptomyces viridochromogenes, were synthesized using the Suzuki coupling reaction as a key step. (C) 1997 Elsevier Science Ltd.