16α-Hydroxyfriedelin and 3-Oxo-16-methylfriedel-16-ene as Building Blocks: Crystal Structure and Hirshfeld Surfaces Decoding Intermolecular Contacts

Scheme 1

The rings of the molecules 1 and 2 should be labeled as A, B, C, D and E. (Ring A = C1, C2, C3, C4, C5 and C10); (Ring B = C5, C6, C7, C8, C9 and C10); (Ring C = C8, C9, C11, C12, C13 and C14); (Ring D = C13, C14, C15, C16, C17 and C18) and (Ring E = C17, C18, C19, C20, C21 and C22).