ユウメラニン(イウメラニン)Eumelanin
\sixheterov[cf,
{B\xFiveCycle(0,0){-18}[bd]{2==N}[]}
]
{4s==\addbond(0,0)(0,-1){200}}
{5D==O;6==HO}
[]
\put(-847,-835){
\sixheteroh[ac,
{A\xFiveCycle(0,0){0}[d]{3==NH}[a]}
]
{4s==\addbond(0,0)(1,0){200}}
{5D==O;6D==O}
[]
}
\put(78,-878){
\sixheterov[ad,
{D\xFiveCycle(0,0){90}[bd]{3==N}[a]}
]
{1s==\addbond(0,0)(0,1){200}}
{2==OH;3D==O}
[]
}
\put(35,43){
\sixheteroh[ac,
{D\xFiveCycle(0,0){180}[ad]{3==\put(70,0){HN}}[a]}
]
{1s==\addbond(0,0)(-1,0){200}}
{2==\lmoiety{HO};3==OH}
[]
}