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system
Name the molecular formula for the molecule established as (3R,4S,6R,7R,8S,8aS)-5'-[3-(carbamoylamino)prop-1-ynyl]-6-[4-(2-hydroxyethoxy)phenyl]-1'-(2-methoxyethoxycarbonyl)-1,2'-dioxo-3,4-diphenylspiro[4,6,8,8a-tetrahydro-3H-pyrrolo[2,1-c][1,4]oxazine-7,3'-indole]-8-carboxylic acid using the IUPAC nomenclature.
user
C43H40N4O11
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