_publ.section_title ; trans-3-Benzoyl-2-(tert-butyl)-4-(iso-butyl)- 1,3-oxazolidin-5-one ; _publ.section_abstract ; The oxazolidinone ring is a shallow envelope conformation with the tert-butyl and iso-butyl groups occupying trans-positions with respect to the ring. The angles at the N atom sum to 356.2\%, indicating a very small degree of pyramidalization at this atom. This is consistent with electron delocalization between the N atom and the carbonyl centre [N-C=O = 1.374(3)\%A]. ;
_publ.section_title ; Hemiasterlin methyl ester ; _publ.section_title_footnote ; IUPAC name: methyl 2,5-dimethyl-4-{2-[3-methyl- 2-methylamino-3-(N-methylbenzo[b]pyrrol- 3-yl)butanamido]-3,3-dimethyl-N-methyl- butanamido}-2-hexenoate. ;