RES
1b:x-dxyl-PEN-1:5
2b:b-dara-HEX-2:5|2:keto
3b:b-dara-HEX-2:5|2:keto
4b:b-dara-HEX-2:5|2:keto
LIN
1:1o(1+2)2d
2:2o(1+2)3d
3:3o(1+2)4d