Reaction catalyzed by 8-demethyl-8-(2-methoxy-alpha-L-rhamnosyl)tetracenomycin-C 3'-O-methyltransferase (2.1.1.306)

		+			=			+
	S-adenosyl-L-methionine	+		8-demethyl-8-alpha-L-rhamnosyl tetracenomycin C	=		S-adenosyl-L-homocysteine	+		8-demethyl-8-(3-O-methyl-alpha-L-rhamnosyl)-tetracenomycin C