*3.3.2.1.1. Indole diterpenes from Aspergillus nidulans*

The marine fungi *A. nidulans* was reported to be the source of 19-hydroxypenitrem A (1) and 19-hydroxypenitrem E (2). The 13C-NMR spectrum of 19-hydroxypenitrem A (C37H44ClNO7 ) provided 37 resonance states from 5 methyl, 8 methylene (with 2 sp2 terminal), 1 sp2 and 7 sp3 methines (with 5 oxygenated), and 16 quaternary (with 5 oxygenated sp<sup>3</sup> and 9 sp2 ) carbon atoms. In comparison, 19-hydroxypenitrem E (C37H45NO7 ) lack chlorine atom but have one additional hydrogen atom [98] (**Figure 15**).
