for the following products
2(3H)-Furanone,5-[(1S,3S)-1-azido-3-[[4-methoxy-3-(3-methoxypropoxy)phenyl]methyl]-4-methylpentyl]dihydro-3-(1-methylethyl)-,(3S,5S)- and 5(S)-[1(S)-Azido-3(S)-[4-methoxy-3-(3-methoxypropoxy)benzyl]-4-methylpentyl]-3(S)-isopropyldihydrofuran-2-one
