Reaction catalyzed by sterol O-acyltransferase (2.3.1.26)

		+			=		20-oxopregn-5-en-3beta-yl (9Z)-octadec-9-enoate	+		CoA
	pregnenolone	+		oleoyl-CoA	=		20-oxopregn-5-en-3beta-yl (9Z)-octadec-9-enoate	+		CoA