9,10-dihydro-11-methoxy-11-(2-oxo-1-trimethylsilyloxycyclobutyl)-9,10-ethanoanthracene

异戊二烯

1,3-环戊二酮

氯甲基甲基醚

(1S,9'R,10'R)-9',10'-dihydrospiro[cyclopentane-1,12'-[9,10]ethanoanthracen]-2-en-5-one