Spiro[2a,6a-epoxynaphth[2,3-b]oxirene-2(1aH),2'-naphtho[1,8-de][1,3]dioxin]-3(6H)-one,6,7-bis(acetyloxy)-7,7a-dihydro-, (1aa,2ab,6a,6ab,7b,7aa)-; Sch 53515
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