RES
1b:x-drib-HEX-1:5|2:d|6:d
2s:methyl
3b:b-dara-HEX-1:5|2:d|6:d
4s:methyl
LIN
1:1o(3+1)2n
2:1o(4+1)3d
3:3o(3+1)4n