RES
1r:r1
REP
REP1:3o(3+1)2d=-1--1
RES
2b:a-ltal-HEX-1:5|6:d
3b:x-ltal-HEX-1:5|6:d
4s:acetyl
LIN
1:2o(2+1)3d
2:3o(2+1)4n