CH3_XX}S ahuCH3_XX}CH3_XX}CH3_XX}=bCH3_XX}S ahuCH3_XX}CH3_XX}CH3_XX}=b
CH3_XX}
CH3_XX}S ahuCH3_XX}CH3_XX}CH3_XX}=bCH3_XX}S ahuCH3_XX}CH3_XX}CH3_XX}=b
