\starttext

\startchemical [axis=on,height=3]
    \chemical [ALKYL,1.5MIR0,
               .25MIR12,-.25MOV12]
    \chemical [SB2,
               2(SB14,BB3,Z034,MOV1,MIR0,
                 DB2,     Z0,  MOV2,MIR0,
                 SB1,     Z0,  MOV1,MIR0,
                 SB2,     Z0,  MOV2,MIR0),
               BB3,SB14,  Z034]
              [2(C,\SL{CH_3},H,
                 CH,CH,CH_2),
               C,\SL{CH_3},H]
    \bottext{1,4-{\it trans} perhydrotriphenylene-polybutadiene}
\stopchemical

\stoptext
